[FIX] getNodesWithParentId == children with null parent_id

src/Data/Gargantext/Database/Node.hs

@@ -15,6 +15,7 @@ import Database.PostgreSQL.Simple.FromField ( Conversion
                                             , fromField
                                             , returnError
                                             )
+import Prelude hiding (null, id)
 import Database.PostgreSQL.Simple.Internal  (Field)
 import Control.Arrow (returnA)
 import Control.Lens.TH (makeLensesWith, abbreviatedFields)
@@ -115,17 +116,29 @@ runGetNodes :: Connection -> Query NodeRead -> IO [Document]
 runGetNodes = runQuery
 
 
-queryNodeTable :: Query NodeRead
-queryNodeTable = queryTable nodeTable
 
 
-selectNodeWithParentID :: Column (Nullable PGInt4) -> Query NodeRead
-selectNodeWithParentID node_id = proc () -> do
+-- NP check type
+getNodesWithParentId :: Connection -> Int -> IO [Node Value]
+getNodesWithParentId conn n = runQuery conn $ selectNodeWithParentID n
+
+selectNodeWithParentID :: Int -> Query NodeRead
+selectNodeWithParentID n = proc () -> do
     row@(Node _id _tn _u p_id _n _d _h) <- queryNodeTable -< ()
-    -- restrict -< maybe (isNull p_id) (p_id .==) node_id
-    restrict -< p_id .== node_id
+    restrict -< if n > 0 
+                   then 
+                        p_id .== (toNullable $ pgInt4 n) 
+                   else 
+                        isNull p_id 
     returnA -< row
 
+queryNodeTable :: Query NodeRead
+queryNodeTable = queryTable nodeTable
+
+
+
+
+
 selectNodesWithType :: Column PGInt4 -> Query NodeRead
 selectNodesWithType type_id = proc () -> do
     row@(Node _ tn _ _ _ _ _) <- queryNodeTable -< ()
@@ -140,16 +153,12 @@ getNodesWithType :: Connection -> Column PGInt4 -> IO [Node Value]
 getNodesWithType conn type_id = do
     runQuery conn $ selectNodesWithType type_id
 
--- NP check type
-getNodesWithParentId :: Connection -> Column (Nullable PGInt4) -> IO [Node Value]
-getNodesWithParentId conn node_id = do
-    runQuery conn $ selectNodeWithParentID node_id
 
 -- NP check type
-getCorpusDocument :: Connection -> Column PGInt4 -> IO [Document]
-getCorpusDocument conn node_id = runQuery conn (selectNodeWithParentID $ toNullable node_id)
+getCorpusDocument :: Connection -> Int -> IO [Document]
+getCorpusDocument conn n = runQuery conn (selectNodeWithParentID n)
 
 -- NP check type
-getProjectCorpora :: Connection -> Column (Nullable PGInt4) -> IO [Corpus]
+getProjectCorpora :: Connection -> Int -> IO [Corpus]
 getProjectCorpora conn node_id = do
     runQuery conn $ selectNodeWithParentID node_id

src/Data/Gargantext/Server.hs

@@ -37,7 +37,7 @@ type API =  "roots"  :> Get '[JSON] [Node Value]
 
 server :: Connection -> Server API
 server conn
-    = liftIO (getNodesWithType conn 1)
+    = liftIO (getNodesWithParentId conn 0)
   :<|> nodeAPI conn
   :<|> echo
   :<|> upload
@@ -71,8 +71,10 @@ api = Proxy
 nodeAPI :: Connection -> NodeId -> Server NodeAPI
 nodeAPI conn id
     =  liftIO (getNode conn id')
-  :<|> liftIO (getNodesWithParentId conn (toNullable id'))
-       where id' = pgInt4 id
+  :<|> liftIO (getNodesWithParentId conn id)
+    where
+        id' = pgInt4 id
+
 
 -- | Upload files
 -- TODO Is it possible to adapt the function according to iValue input ?

src/Data/Gargantext/Types/Main.hs

@@ -31,7 +31,6 @@ data Language = EN | FR -- | DE | IT | SP
     -- > ... add your language and help us to implement it (:
 
 
-
 -- All the Database is structred like a hierarchical Tree
 data Tree a = NodeT a [Tree a]
               deriving (Show, Read, Eq)