mirror of
https://github.com/hasura/graphql-engine.git
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222 lines
8.1 KiB
Haskell
222 lines
8.1 KiB
Haskell
module Hasura.RQL.DML.Insert
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( runInsert
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) where
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import Hasura.Prelude
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import qualified Data.HashMap.Strict as HM
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import qualified Data.HashSet as HS
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import qualified Data.Sequence as DS
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import qualified Database.PG.Query as Q
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import Data.Aeson.Types
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import Data.Text.Extended
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import qualified Hasura.Backends.Postgres.SQL.DML as S
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import Hasura.Backends.Postgres.Connection
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import Hasura.Backends.Postgres.Execute.Mutation
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import Hasura.Backends.Postgres.SQL.Types
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import Hasura.Backends.Postgres.Translate.Returning
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import Hasura.EncJSON
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import Hasura.RQL.DML.Internal
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import Hasura.RQL.DML.Types
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import Hasura.RQL.IR.Insert
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import Hasura.RQL.Types
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import Hasura.Server.Version (HasVersion)
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import Hasura.Session
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import qualified Data.Environment as Env
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import qualified Hasura.Tracing as Tracing
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convObj
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:: (UserInfoM m, QErrM m)
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=> (ColumnType 'Postgres -> Value -> m S.SQLExp)
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-> HM.HashMap PGCol S.SQLExp
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-> HM.HashMap PGCol S.SQLExp
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-> FieldInfoMap (FieldInfo 'Postgres)
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-> InsObj
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-> m ([PGCol], [S.SQLExp])
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convObj prepFn defInsVals setInsVals fieldInfoMap insObj = do
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inpInsVals <- flip HM.traverseWithKey insObj $ \c val -> do
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let relWhenPGErr = "relationships can't be inserted"
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colType <- askPGType fieldInfoMap c relWhenPGErr
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-- if column has predefined value then throw error
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when (c `elem` preSetCols) $ throwNotInsErr c
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-- Encode aeson's value into prepared value
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withPathK (getPGColTxt c) $ prepFn colType val
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let insVals = HM.union setInsVals inpInsVals
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sqlExps = HM.elems $ HM.union insVals defInsVals
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inpCols = HM.keys inpInsVals
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return (inpCols, sqlExps)
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where
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preSetCols = HM.keys setInsVals
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throwNotInsErr c = do
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roleName <- _uiRole <$> askUserInfo
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throw400 NotSupported $ "column " <> c <<> " is not insertable"
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<> " for role " <>> roleName
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validateInpCols :: (MonadError QErr m) => [PGCol] -> [PGCol] -> m ()
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validateInpCols inpCols updColsPerm = forM_ inpCols $ \inpCol ->
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unless (inpCol `elem` updColsPerm) $ throw400 ValidationFailed $
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"column " <> inpCol <<> " is not updatable"
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buildConflictClause
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:: (UserInfoM m, QErrM m)
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=> SessVarBldr 'Postgres m
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-> TableInfo 'Postgres
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-> [PGCol]
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-> OnConflict
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-> m (ConflictClauseP1 'Postgres S.SQLExp)
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buildConflictClause sessVarBldr tableInfo inpCols (OnConflict mTCol mTCons act) =
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case (mTCol, mTCons, act) of
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(Nothing, Nothing, CAIgnore) -> return $ CP1DoNothing Nothing
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(Just col, Nothing, CAIgnore) -> do
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validateCols col
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return $ CP1DoNothing $ Just $ CTColumn $ getPGCols col
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(Nothing, Just cons, CAIgnore) -> do
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validateConstraint cons
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return $ CP1DoNothing $ Just $ CTConstraint cons
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(Nothing, Nothing, CAUpdate) -> throw400 UnexpectedPayload
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"Expecting 'constraint' or 'constraint_on' when the 'action' is 'update'"
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(Just col, Nothing, CAUpdate) -> do
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validateCols col
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(updFltr, preSet) <- getUpdPerm
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resolvedUpdFltr <- convAnnBoolExpPartialSQL sessVarBldr updFltr
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resolvedPreSet <- mapM (convPartialSQLExp sessVarBldr) preSet
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return $ CP1Update (CTColumn $ getPGCols col) inpCols resolvedPreSet resolvedUpdFltr
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(Nothing, Just cons, CAUpdate) -> do
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validateConstraint cons
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(updFltr, preSet) <- getUpdPerm
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resolvedUpdFltr <- convAnnBoolExpPartialSQL sessVarBldr updFltr
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resolvedPreSet <- mapM (convPartialSQLExp sessVarBldr) preSet
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return $ CP1Update (CTConstraint cons) inpCols resolvedPreSet resolvedUpdFltr
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(Just _, Just _, _) -> throw400 UnexpectedPayload
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"'constraint' and 'constraint_on' cannot be set at a time"
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where
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coreInfo = _tiCoreInfo tableInfo
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fieldInfoMap = _tciFieldInfoMap coreInfo
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-- toSQLBool = toSQLBoolExp (S.mkQual $ _tciName coreInfo)
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validateCols c = do
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let targetcols = getPGCols c
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void $ withPathK "constraint_on" $ indexedForM targetcols $
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\pgCol -> askPGType fieldInfoMap pgCol ""
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validateConstraint c = do
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let tableConsNames = maybe [] toList $
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fmap _cName <$> tciUniqueOrPrimaryKeyConstraints coreInfo
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withPathK "constraint" $
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unless (c `elem` tableConsNames) $
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throw400 Unexpected $ "constraint " <> getConstraintTxt c
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<<> " for table " <> _tciName coreInfo
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<<> " does not exist"
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getUpdPerm = do
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upi <- askUpdPermInfo tableInfo
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let updFiltr = upiFilter upi
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preSet = upiSet upi
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updCols = HS.toList $ upiCols upi
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validateInpCols inpCols updCols
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return (updFiltr, preSet)
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convInsertQuery
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:: (UserInfoM m, QErrM m, CacheRM m)
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=> (Value -> m [InsObj])
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-> SessVarBldr 'Postgres m
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-> (ColumnType 'Postgres -> Value -> m S.SQLExp)
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-> InsertQuery
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-> m (InsertQueryP1 'Postgres)
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convInsertQuery objsParser sessVarBldr prepFn (InsertQuery tableName val oC mRetCols) = do
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insObjs <- objsParser val
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-- Get the current table information
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tableInfo <- askTabInfo tableName
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let coreInfo = _tiCoreInfo tableInfo
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-- If table is view then check if it is insertable
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mutableView tableName viIsInsertable
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(_tciViewInfo coreInfo) "insertable"
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-- Check if the role has insert permissions
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insPerm <- askInsPermInfo tableInfo
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updPerm <- askPermInfo' PAUpdate tableInfo
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-- Check if all dependent headers are present
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validateHeaders $ ipiRequiredHeaders insPerm
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let fieldInfoMap = _tciFieldInfoMap coreInfo
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setInsVals = ipiSet insPerm
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-- convert the returning cols into sql returing exp
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mAnnRetCols <- forM mRetCols $ \retCols -> do
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-- Check if select is allowed only if you specify returning
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selPerm <- modifyErr (<> selNecessaryMsg) $
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askSelPermInfo tableInfo
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withPathK "returning" $ checkRetCols fieldInfoMap selPerm retCols
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let mutOutput = mkDefaultMutFlds mAnnRetCols
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let defInsVals = S.mkColDefValMap $
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map pgiColumn $ getCols fieldInfoMap
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allCols = getCols fieldInfoMap
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insCols = HM.keys defInsVals
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resolvedPreSet <- mapM (convPartialSQLExp sessVarBldr) setInsVals
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insTuples <- withPathK "objects" $ indexedForM insObjs $ \obj ->
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convObj prepFn defInsVals resolvedPreSet fieldInfoMap obj
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let sqlExps = map snd insTuples
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inpCols = HS.toList $ HS.fromList $ concatMap fst insTuples
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insCheck <- convAnnBoolExpPartialSQL sessVarFromCurrentSetting (ipiCheck insPerm)
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updCheck <- traverse (convAnnBoolExpPartialSQL sessVarFromCurrentSetting) (upiCheck =<< updPerm)
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conflictClause <- withPathK "on_conflict" $ forM oC $ \c -> do
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roleName <- askCurRole
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unless (isTabUpdatable roleName tableInfo) $ throw400 PermissionDenied $
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"upsert is not allowed for role " <> roleName
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<<> " since update permissions are not defined"
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buildConflictClause sessVarBldr tableInfo inpCols c
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return $ InsertQueryP1 tableName insCols sqlExps
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conflictClause (insCheck, updCheck) mutOutput allCols
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where
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selNecessaryMsg =
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"; \"returning\" can only be used if the role has "
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<> "\"select\" permission on the table"
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convInsQ
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:: (QErrM m, UserInfoM m, CacheRM m)
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=> InsertQuery
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-> m (InsertQueryP1 'Postgres, DS.Seq Q.PrepArg)
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convInsQ =
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runDMLP1T .
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convInsertQuery (withPathK "objects" . decodeInsObjs)
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sessVarFromCurrentSetting
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binRHSBuilder
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runInsert
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:: ( HasVersion, QErrM m, UserInfoM m
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, CacheRM m, MonadTx m, HasSQLGenCtx m, MonadIO m
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, Tracing.MonadTrace m
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)
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=> Env.Environment -> InsertQuery -> m EncJSON
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runInsert env q = do
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res <- convInsQ q
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strfyNum <- stringifyNum <$> askSQLGenCtx
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execInsertQuery env strfyNum Nothing res
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decodeInsObjs :: (UserInfoM m, QErrM m) => Value -> m [InsObj]
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decodeInsObjs v = do
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objs <- decodeValue v
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when (null objs) $ throw400 UnexpectedPayload "objects should not be empty"
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return objs
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