Use my new persistent-migration library, to which I moved the related modules
This commit is contained in:
fr33domlover
parent
3b4bd2a5e8
commit
829fd72fef
6 changed files with 3 additions and 528 deletions
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@ -1,6 +1,6 @@
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-- This file is part of Vervis.
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--
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-- Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
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-- Written in 2016, 2018 by fr33domlover <fr33domlover@riseup.net>.
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--
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-- ♡ Copying is an act of love. Please copy, reuse and share.
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--
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@ -12,13 +12,6 @@
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-- with this software. If not, see
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-- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-------------------------------------------------------------------------------
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-- Meta
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-------------------------------------------------------------------------------
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SchemaVersion
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number Int
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-------------------------------------------------------------------------------
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-- People
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-------------------------------------------------------------------------------
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@ -1,160 +0,0 @@
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{- This file is part of Vervis.
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-
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- Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
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-
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- ♡ Copying is an act of love. Please copy, reuse and share.
|
||||
-
|
||||
- The author(s) have dedicated all copyright and related and neighboring
|
||||
- rights to this software to the public domain worldwide. This software is
|
||||
- distributed without any warranty.
|
||||
-
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- You should have received a copy of the CC0 Public Domain Dedication along
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- with this software. If not, see
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- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-}
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module Database.Persist.Schema
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( FieldName (..)
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, EntityName (..)
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, UniqueName (..)
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, FieldType (..)
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, MaybeNull (..)
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, Field (..)
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, Entity (..)
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, Unique (..)
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, SchemaT
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, PersistSchema (..)
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)
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where
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import Prelude
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import Control.Monad.IO.Class (MonadIO)
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import Control.Monad.Trans.Reader (ReaderT)
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import Data.Char (isAsciiLower, isAsciiUpper)
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import Data.String (IsString (..))
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import Data.Text (Text)
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import Database.Persist.Types (SqlType)
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import qualified Data.Text as T (uncons, all, stripPrefix)
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import Data.Char.Local (isAsciiLetter)
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newtype FieldName = FieldName { unFieldName :: Text }
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instance IsString FieldName where
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fromString s =
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let t = fromString s
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in case T.uncons t of
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Nothing -> error "empty field name"
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Just (c, r) ->
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if isAsciiLower c
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then
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if T.all isAsciiLetter r
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then FieldName t
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else
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error "non ascii-letter char in field name"
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else
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error
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"field name doesn't start with lowercase \
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\ascii letter"
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newtype EntityName = EntityName { unEntityName :: Text }
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instance IsString EntityName where
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fromString s =
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let t = fromString s
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in case T.uncons t of
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Nothing -> error "empty entity name"
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Just (c, r) ->
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if isAsciiUpper c
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then
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if T.all isAsciiLetter r
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then EntityName t
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else
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error
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"non ascii-letter char in entity name"
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else
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error
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"entity name doesn't start with uppercase \
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\ascii letter"
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newtype UniqueName = UniqueName { unUniqueName :: Text }
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instance IsString UniqueName where
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fromString s =
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let t = fromString s
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in case T.stripPrefix "Unique" t of
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Nothing -> error "unique name doesn't start with \"Unique\""
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Just u ->
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case T.uncons u of
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Nothing -> error "unique name is just \"Unique\""
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Just (c, r) ->
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if isAsciiUpper c
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then
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if T.all isAsciiLetter r
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then UniqueName t
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else
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error
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"non ascii-letter char in \
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\unique name"
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else
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error
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"unique name doesn't follow with \
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\uppercase ascii letter after Unique"
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data FieldType = FTPrim SqlType | FTRef
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data MaybeNull = MaybeNull | NotNull
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data Field = Field
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{ fieldName :: FieldName
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, fieldType :: FieldType
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, fieldNull :: MaybeNull
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}
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data Entity = Entity
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{ entityName :: EntityName
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, entityFields :: [Field]
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, entityUniques :: [Unique]
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}
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data Unique = Unique
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{ uniqueName :: UniqueName
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, uniqueFields :: [FieldName]
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}
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type SchemaT b m = ReaderT (SchemaBackend b) (ReaderT b m)
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-- | Ideally we'd make the @backend@ provide schema related specifics. The
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-- problem is that e.g. @SqlBackend@ is already defined in @persistent@ and
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-- I'll need a patch to get it updated. A patch that will take time to get
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-- accpted, if the maintainer likes it at all. So instead, I'm letting these
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-- specifics be specified in a separate, associated data type.
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--
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-- The only benefit I see for this approach is schema changes are separate from
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-- data manipulations. You can't mix them in a single transaction without
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-- explicitly specifying the schema backend and using 'lift' for data manip.
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class PersistSchema backend where
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data SchemaBackend backend -- :: *
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hasSchemaEntity
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:: MonadIO m => SchemaT backend m Bool
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addEntity
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:: MonadIO m => Entity -> SchemaT backend m ()
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removeEntity
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:: MonadIO m => EntityName -> SchemaT backend m ()
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addField
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:: MonadIO m
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=> EntityName -> Maybe Text -> Field -> SchemaT backend m ()
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renameField
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:: MonadIO m
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=> EntityName -> FieldName -> FieldName -> SchemaT backend m ()
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removeField
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:: MonadIO m => EntityName -> FieldName -> SchemaT backend m ()
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addUnique
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:: MonadIO m => EntityName -> Unique -> SchemaT backend m ()
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renameUnique
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:: MonadIO m
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=> EntityName -> UniqueName -> UniqueName -> SchemaT backend m ()
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removeUnique
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:: MonadIO m => EntityName -> UniqueName -> SchemaT backend m ()
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@ -1,165 +0,0 @@
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{- This file is part of Vervis.
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-
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- Written in 2016, 2017 by fr33domlover <fr33domlover@riseup.net>.
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-
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- ♡ Copying is an act of love. Please copy, reuse and share.
|
||||
-
|
||||
- The author(s) have dedicated all copyright and related and neighboring
|
||||
- rights to this software to the public domain worldwide. This software is
|
||||
- distributed without any warranty.
|
||||
-
|
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- You should have received a copy of the CC0 Public Domain Dedication along
|
||||
- with this software. If not, see
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||||
- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-}
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module Database.Persist.Schema.PostgreSQL
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( schemaBackend
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)
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where
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import Prelude
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import Data.Monoid ((<>))
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import Data.Text (Text)
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import Database.Persist.Sql (SqlBackend)
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import Database.Persist.Types (SqlType (..))
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import Formatting
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import qualified Data.Text as T (empty, pack, intercalate, foldr)
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import Database.Persist.Schema
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import Database.Persist.Schema.Sql
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quoteName :: Text -> Text
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quoteName =
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let f '\0' _ = error "quoteName found \\0 character, invalid in names"
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f '"' cs = '"' : '"' : cs
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f c cs = c : cs
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in T.pack . ('"' :) . T.foldr f "\""
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table2sql :: TableName -> Text
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table2sql = quoteName . unTableName
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column2sql :: ColumnName -> Text
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column2sql = quoteName . unColumnName
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constraint2sql :: ConstraintName -> Text
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constraint2sql = quoteName . unConstraintName
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typeSql :: SqlType -> Text
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typeSql SqlString = "VARCHAR"
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typeSql SqlInt32 = "INT4"
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typeSql SqlInt64 = "INT8"
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typeSql SqlReal = "DOUBLE PRECISION"
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typeSql (SqlNumeric prec scale) =
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sformat ("NUMERIC(" % int % "," % int % ")") prec scale
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typeSql SqlDay = "DATE"
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typeSql SqlTime = "TIME"
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typeSql SqlDayTime = "TIMESTAMP WITH TIME ZONE"
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typeSql SqlBlob = "BYTEA"
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typeSql SqlBool = "BOOLEAN"
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typeSql (SqlOther t) = t
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columnSql :: Column -> Text
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columnSql (Column name typ mnull) = mconcat
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[ column2sql name, " "
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, typeSql typ
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, case mnull of
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MaybeNull -> " NULL"
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NotNull -> " NOT NULL"
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]
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idCol :: ColumnName
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idCol = ColumnName "id"
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idSql :: Text
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idSql = "id SERIAL8 PRIMARY KEY UNIQUE"
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schemaBackend :: SchemaBackend SqlBackend
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schemaBackend = SqlSchemaBackend
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{ ssbRefType = SqlInt64
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, ssbDoesTableExist =
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"SELECT COUNT(*) FROM pg_catalog.pg_tables \
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\ WHERE schemaname != 'pg_catalog' AND \
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\ schemaname != 'information_schema' AND \
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\ tablename = ?"
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, ssbCreateTable = \ table columns -> mconcat
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[ "CREATE TABLE ", table2sql table, " ("
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, idSql
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, if null columns then T.empty else ", "
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, T.intercalate ", " $ map columnSql columns
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, ")"
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]
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, ssbRenameTable = \ old new -> mconcat
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[ "ALTER TABLE ", table2sql old
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, " RENAME TO ", table2sql new
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]
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, ssbDropTable = \ table -> mconcat
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[ "DROP TABLE ", table2sql table
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]
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, ssbAddColumn = \ table column mdef -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " ADD COLUMN ", columnSql column
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, case mdef of
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Nothing -> T.empty
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Just t -> " DEFAULT " <> t
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]
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, ssbRenameColumn = \ table old new -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " RENAME COLUMN ", column2sql old, " TO ", column2sql new
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]
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, ssbRetypeColumn = \ table column typ -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " ALTER COLUMN ", column2sql column
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, " TYPE ", typeSql typ
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]
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, ssbRenullColumn = \ table column mnull -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " ALTER COLUMN ", column2sql column
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, case mnull of
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MaybeNull -> " DROP"
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NotNull -> " SET"
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, " NOT NULL"
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]
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, ssbUnnullColumn = \ table column val -> mconcat
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[ "UPDATE ", table2sql table
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, " SET ", column2sql column, " = ", val
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, " WHERE ", column2sql column, " IS NULL"
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]
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, ssbDefColumn = \ table column val -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " ALTER COLUMN ", column2sql column
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, " SET DEFAULT ", val
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]
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, ssbUndefColumn = \ table column -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " ALTER COLUMN ", column2sql column
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, " DROP DEFAULT"
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]
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, ssbDropColumn = \ table column -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " DROP COLUMN ", column2sql column
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]
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, ssbAddUnique = \ table constraint columns -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " ADD CONSTRAINT ", constraint2sql constraint
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, " UNIQUE("
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, T.intercalate ", " $ map column2sql columns
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, ")"
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]
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, ssbAddForeignKey = \ table constraint column target -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " ADD CONSTRAINT ", constraint2sql constraint
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, " FOREIGN KEY(", column2sql column
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, ") REFERENCES ", table2sql target, "(", column2sql idCol, ")"
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]
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, ssbRenameConstraint = \ _table old new -> mconcat
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[ "ALTER INDEX ", constraint2sql old
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, " RENAME TO ", constraint2sql new
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]
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, ssbDropConstraint = \ table constraint -> mconcat
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[ "ALTER TABLE ", table2sql table
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, " DROP CONSTRAINT ", constraint2sql constraint
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]
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}
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@ -1,191 +0,0 @@
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{- This file is part of Vervis.
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-
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||||
- Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
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||||
-
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||||
- ♡ Copying is an act of love. Please copy, reuse and share.
|
||||
-
|
||||
- The author(s) have dedicated all copyright and related and neighboring
|
||||
- rights to this software to the public domain worldwide. This software is
|
||||
- distributed without any warranty.
|
||||
-
|
||||
- You should have received a copy of the CC0 Public Domain Dedication along
|
||||
- with this software. If not, see
|
||||
- <http://creativecommons.org/publicdomain/zero/1.0/>.
|
||||
-}
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-- | SQL schema backend specifying SQL statements for manipulating a SQL
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-- database's table schema.
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module Database.Persist.Schema.Sql
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( TableName (..)
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, ColumnName (..)
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, ConstraintName (..)
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, Column (..)
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, SchemaBackend (..)
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)
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where
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import Prelude
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import Control.Monad (when)
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import Control.Monad.IO.Class (MonadIO)
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import Control.Monad.Trans.Class (lift)
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import Control.Monad.Trans.Reader (ask)
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import Data.Char (isUpper, toLower)
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import Data.Foldable (traverse_)
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import Data.Maybe (isJust)
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import Data.Text (Text)
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import Database.Persist.Sql hiding (FieldType, Entity, Column)
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import Database.Persist.Types (SqlType)
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import qualified Data.Conduit.List as CL (head)
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import qualified Data.Text as T
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import Database.Persist.Schema
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newtype TableName = TableName { unTableName :: Text }
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newtype ColumnName = ColumnName { unColumnName :: Text }
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newtype ConstraintName = ConstraintName { unConstraintName :: Text }
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data Column = Column
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{ colName :: ColumnName
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, colType :: SqlType
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, colNull :: MaybeNull
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}
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exec :: MonadIO m => Sql -> SchemaT SqlBackend m ()
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exec t = lift $ rawExecute t []
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inquire
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:: MonadIO m => Sql -> [PersistValue] -> SchemaT SqlBackend m PersistValue
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inquire t vs = lift $ withRawQuery t vs $ do
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l <- CL.head
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case l of
|
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Just [x] -> return x
|
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Just [] -> error $ "inquire: got empty list " ++ show t
|
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Just xs -> error $ "inquire: got multiple values " ++ show xs ++ show t
|
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Nothing -> error $ "inquire: got nothing " ++ show t
|
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|
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camelWords :: Text -> [Text]
|
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camelWords ident =
|
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let low = toLower
|
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slow = T.singleton . toLower
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go c t l =
|
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let (x, y) = T.break isUpper t
|
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in case (T.null x, T.uncons y) of
|
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(True, Nothing) -> slow c : l
|
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(True, Just (d, r)) -> go d r $ slow c : l
|
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(False, Nothing) -> (low c `T.cons` x) : l
|
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(False, Just (d, r)) -> go d r $ (low c `T.cons` x) : l
|
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(a, b) = T.break isUpper ident
|
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in reverse $ case (T.null a, T.uncons b) of
|
||||
(True, Nothing) -> []
|
||||
(True, Just (c, r)) -> go c r []
|
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(False, Nothing) -> [a]
|
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(False, Just (c, r)) -> go c r [a]
|
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|
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dbname :: Text -> Text
|
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dbname = T.intercalate (T.singleton '_') . camelWords
|
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|
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entity2table :: EntityName -> TableName
|
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entity2table (EntityName t) = TableName $ dbname t
|
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|
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field2column :: FieldName -> ColumnName
|
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field2column (FieldName t) = ColumnName $ dbname t
|
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|
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unique2constraint :: UniqueName -> ConstraintName
|
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unique2constraint (UniqueName t) = ConstraintName $ dbname t
|
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|
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type2sql :: SchemaBackend SqlBackend -> FieldType -> SqlType
|
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type2sql _ (FTPrim t) = t
|
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type2sql ssb FTRef = ssbRefType ssb
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|
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mkcolumn :: SchemaBackend SqlBackend -> Field -> Column
|
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mkcolumn ssb (Field name typ mnull) = Column
|
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{ colName = field2column name
|
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, colType = type2sql ssb typ
|
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, colNull = mnull
|
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}
|
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|
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instance PersistSchema SqlBackend where
|
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data SchemaBackend SqlBackend = SqlSchemaBackend
|
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{ ssbRefType :: SqlType
|
||||
, ssbDoesTableExist :: Sql
|
||||
, ssbCreateTable :: TableName -> [Column] -> Sql
|
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, ssbRenameTable :: TableName -> TableName -> Sql
|
||||
, ssbDropTable :: TableName -> Sql
|
||||
, ssbAddColumn :: TableName -> Column -> Maybe Text -> Sql
|
||||
, ssbRenameColumn :: TableName -> ColumnName -> ColumnName -> Sql
|
||||
, ssbRetypeColumn :: TableName -> ColumnName -> SqlType -> Sql
|
||||
, ssbRenullColumn :: TableName -> ColumnName -> MaybeNull -> Sql
|
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, ssbUnnullColumn :: TableName -> ColumnName -> Text -> Sql
|
||||
, ssbDefColumn :: TableName -> ColumnName -> Text -> Sql
|
||||
, ssbUndefColumn :: TableName -> ColumnName -> Sql
|
||||
, ssbDropColumn :: TableName -> ColumnName -> Sql
|
||||
, ssbAddUnique
|
||||
:: TableName -> ConstraintName -> [ColumnName] -> Sql
|
||||
, ssbAddForeignKey
|
||||
:: TableName -> ConstraintName -> ColumnName -> TableName -> Sql
|
||||
, ssbRenameConstraint
|
||||
:: TableName -> ConstraintName -> ConstraintName -> Sql
|
||||
, ssbDropConstraint :: TableName -> ConstraintName -> Sql
|
||||
}
|
||||
hasSchemaEntity = do
|
||||
ssb <- ask
|
||||
let table =
|
||||
toPersistValue $ unTableName $ entity2table $ EntityName $
|
||||
T.pack "SchemaVersion"
|
||||
v <- inquire (ssbDoesTableExist ssb) [table]
|
||||
case v of
|
||||
PersistInt64 1 -> return True
|
||||
PersistInt64 0 -> return False
|
||||
_ -> error "hasSchemaEntity: count inquiry didn't return a number"
|
||||
addEntity (Entity name fields uniques) = do
|
||||
ssb <- ask
|
||||
exec $
|
||||
ssbCreateTable ssb (entity2table name) (map (mkcolumn ssb) fields)
|
||||
traverse_ (addUnique name) uniques
|
||||
removeEntity name = do
|
||||
ssb <- ask
|
||||
exec $ ssbDropTable ssb $ entity2table name
|
||||
addField ent mdef (Field name typ mnull) = do
|
||||
ssb <- ask
|
||||
exec $
|
||||
ssbAddColumn ssb
|
||||
(entity2table ent)
|
||||
(Column (field2column name) (type2sql ssb typ) mnull)
|
||||
mdef
|
||||
when (isJust mdef) $
|
||||
exec $
|
||||
ssbUndefColumn ssb (entity2table ent) (field2column name)
|
||||
renameField entity old new = do
|
||||
ssb <- ask
|
||||
exec $
|
||||
ssbRenameColumn ssb
|
||||
(entity2table entity)
|
||||
(field2column old)
|
||||
(field2column new)
|
||||
removeField entity field = do
|
||||
ssb <- ask
|
||||
exec $ ssbDropColumn ssb (entity2table entity) (field2column field)
|
||||
addUnique entity (Unique name fields) = do
|
||||
ssb <- ask
|
||||
exec $
|
||||
ssbAddUnique ssb
|
||||
(entity2table entity)
|
||||
(unique2constraint name)
|
||||
(map field2column fields)
|
||||
renameUnique entity old new = do
|
||||
ssb <- ask
|
||||
exec $
|
||||
ssbRenameConstraint ssb
|
||||
(entity2table entity)
|
||||
(unique2constraint old)
|
||||
(unique2constraint new)
|
||||
removeUnique entity name = do
|
||||
ssb <- ask
|
||||
exec $
|
||||
ssbDropConstraint ssb
|
||||
(entity2table entity)
|
||||
(unique2constraint name)
|
||||
|
|
@ -12,6 +12,7 @@ packages:
|
|||
- '../hit-graph'
|
||||
- '../hit-harder'
|
||||
- '../hit-network'
|
||||
- '../persistent-migration'
|
||||
|
||||
# Packages to be pulled from upstream that are not in the resolver (e.g.,
|
||||
# acme-missiles-0.3)
|
||||
|
|
|
|||
|
|
@ -83,10 +83,6 @@ library
|
|||
Database.Persist.Local.Sql
|
||||
Database.Persist.Local.Sql.Orphan.Common
|
||||
Database.Persist.Local.Sql.Orphan.PersistQueryForest
|
||||
Database.Persist.Migration
|
||||
Database.Persist.Schema
|
||||
Database.Persist.Schema.PostgreSQL
|
||||
Database.Persist.Schema.Sql
|
||||
Development.DarcsRev
|
||||
Diagrams.IntransitiveDAG
|
||||
Formatting.CaseInsensitive
|
||||
|
|
@ -276,6 +272,7 @@ library
|
|||
-- for PathPiece instance for CI, Web.PathPieces.Local
|
||||
, path-pieces
|
||||
, persistent
|
||||
, persistent-migration
|
||||
, persistent-postgresql
|
||||
, persistent-template
|
||||
, process
|
||||
|
|
|
|||
Loading…
Reference in a new issue