Replace some Esqueleto with much simpler Persistent queries

src/Vervis/Handler/Person.hs

@@ -87,14 +87,10 @@ getPersonNewR = do
 
 getPersonR :: Text -> Handler Html
 getPersonR ident = do
-    people <- runDB $ select $ from $ \ (sharer, person) -> do
-        where_ $
-            sharer ^. SharerIdent ==. val ident &&.
-            sharer ^. SharerId ==. person ^. PersonIdent
-        return person
-    case people of
-        []   -> notFound
-        p:ps -> defaultLayout $ do
-            let mperson = if null ps then Just p else Nothing
+    person <- runDB $ do
+        Entity sid _s <- getBy404 $ UniqueSharerIdent ident
+        Entity _pid p <- getBy404 $ UniquePersonIdent sid
+        return p
+    defaultLayout $ do
         setTitle $ text $ "Vervis > People > " <> ident
         $(widgetFile "person")

src/Vervis/Handler/Project.hs

@@ -72,16 +72,11 @@ getProjectNewR ident = do
 
 getProjectR :: Text -> Text -> Handler Html
 getProjectR user proj = do
-    projects <- runDB $ select $ from $ \ (sharer, project) -> do
-        where_ $
-            sharer ^. SharerIdent ==. val user &&.
-            project ^. ProjectIdent ==. val proj &&.
-            sharer ^. SharerId ==. project ^. ProjectSharer
-        return project
-    case projects of
-        []   -> notFound
-        p:ps -> defaultLayout $ do
-            let mproject = if null ps then Just p else Nothing
+    project <- runDB $ do
+        Entity sid _s <- getBy404 $ UniqueSharerIdent user
+        Entity _pid p <- getBy404 $ UniqueProject proj sid
+        return p
+    defaultLayout $ do
         setTitle $ text $ mconcat
             [ "Vervis > People > "
             , user

templates/person.hamlet

@@ -14,15 +14,11 @@ $# <http://creativecommons.org/publicdomain/zero/1.0/>.
 
 <h1>Vervis > People > #{ident}
 
-$maybe Entity _pid _person <- mperson
-  <h2>About
-  <p>
+<h2>About
+<p>
   This is the user page for <b>#{ident}</b>
 
-  <h2>Projects
-  <p>
+<h2>Projects
+<p>
   See
   <a href=@{ProjectsR ident}>projects</a>.
-
-$nothing
-  <p>Internal error: More than one user with the same identifier!

templates/project.hamlet

@@ -14,12 +14,11 @@ $# <http://creativecommons.org/publicdomain/zero/1.0/>.
 
 <h1>Vervis > People > #{user} > Projects > #{proj}
 
-$maybe Entity _pid project <- mproject
-  <h2>About
-  <p>This is the project page for <b>#{proj}</b>, shared by <b>#{user}</b>.
+<h2>About
+<p>This is the project page for <b>#{proj}</b>, shared by <b>#{user}</b>.
 
-  <h2>Details
-  <table>
+<h2>Details
+<table>
   <tr>
     <td>Human-friendly name
     <td>
@@ -35,5 +34,8 @@ $maybe Entity _pid project <- mproject
       $nothing
         (none)
 
-$nothing
-  <p>Internal error: More than one project per user/proj name pair!
+<h2>Repos
+
+<p>
+  See
+  <a href=@{ReposR user proj}>repos</a>.