mirror of
https://github.com/hasura/graphql-engine.git
synced 2024-12-17 12:31:52 +03:00
275 lines
9.1 KiB
Haskell
275 lines
9.1 KiB
Haskell
{-# LANGUAGE FlexibleContexts #-}
|
|
{-# LANGUAGE FlexibleInstances #-}
|
|
{-# LANGUAGE MultiParamTypeClasses #-}
|
|
{-# LANGUAGE OverloadedStrings #-}
|
|
{-# LANGUAGE TypeFamilies #-}
|
|
|
|
module Hasura.RQL.DML.Insert where
|
|
|
|
import Data.Aeson.Types
|
|
import Instances.TH.Lift ()
|
|
|
|
import qualified Data.Aeson.Text as AT
|
|
import qualified Data.HashMap.Strict as HM
|
|
import qualified Data.HashSet as HS
|
|
import qualified Data.Sequence as DS
|
|
import qualified Data.Text.Lazy as LT
|
|
|
|
import Hasura.Prelude
|
|
import Hasura.RQL.DML.Internal
|
|
import Hasura.RQL.DML.Returning
|
|
import Hasura.RQL.Instances ()
|
|
import Hasura.RQL.Types
|
|
import Hasura.SQL.Types
|
|
|
|
import qualified Database.PG.Query as Q
|
|
import qualified Hasura.SQL.DML as S
|
|
|
|
data ConflictTarget
|
|
= Column ![PGCol]
|
|
| Constraint !ConstraintName
|
|
deriving (Show, Eq)
|
|
|
|
data ConflictClauseP1
|
|
= CP1DoNothing !(Maybe ConflictTarget)
|
|
| CP1Update !ConflictTarget ![PGCol]
|
|
deriving (Show, Eq)
|
|
|
|
isDoNothing :: ConflictClauseP1 -> Bool
|
|
isDoNothing (CP1DoNothing _) = True
|
|
isDoNothing _ = False
|
|
|
|
data InsertQueryP1
|
|
= InsertQueryP1
|
|
{ iqp1Table :: !QualifiedTable
|
|
, iqp1View :: !QualifiedTable
|
|
, iqp1Cols :: ![PGCol]
|
|
, iqp1Tuples :: ![[S.SQLExp]]
|
|
, iqp1Conflict :: !(Maybe ConflictClauseP1)
|
|
, iqp1MutFlds :: !MutFlds
|
|
} deriving (Show, Eq)
|
|
|
|
mkSQLInsert :: InsertQueryP1 -> S.SelectWith
|
|
mkSQLInsert (InsertQueryP1 tn vn cols vals c mutFlds) =
|
|
mkSelWith tn (S.CTEInsert insert) mutFlds
|
|
where
|
|
insert =
|
|
S.SQLInsert vn cols vals (toSQLConflict <$> c) $ Just S.returningStar
|
|
|
|
toSQLConflict :: ConflictClauseP1 -> S.SQLConflict
|
|
toSQLConflict conflict = case conflict of
|
|
(CP1DoNothing Nothing) -> S.DoNothing Nothing
|
|
(CP1DoNothing (Just ct)) -> S.DoNothing $ Just $ toSQLCT ct
|
|
(CP1Update ct inpCols) -> S.Update (toSQLCT ct)
|
|
(S.buildSEWithExcluded inpCols)
|
|
|
|
where
|
|
toSQLCT ct = case ct of
|
|
Column pgCols -> S.SQLColumn pgCols
|
|
Constraint cn -> S.SQLConstraint cn
|
|
|
|
mkDefValMap :: FieldInfoMap -> HM.HashMap PGCol S.SQLExp
|
|
mkDefValMap cim =
|
|
HM.fromList $ flip zip (repeat $ S.SEUnsafe "DEFAULT") $
|
|
map (PGCol . getFieldNameTxt) $ HM.keys $ HM.filter isPGColInfo cim
|
|
|
|
getInsertDeps
|
|
:: InsertQueryP1 -> [SchemaDependency]
|
|
getInsertDeps (InsertQueryP1 tn _ _ _ _ mutFlds) =
|
|
mkParentDep tn : retDeps
|
|
where
|
|
retDeps = map (mkColDep "untyped" tn . fst) $
|
|
pgColsFromMutFlds mutFlds
|
|
|
|
convObj
|
|
:: (P1C m)
|
|
=> (PGColType -> Value -> m S.SQLExp)
|
|
-> HM.HashMap PGCol S.SQLExp
|
|
-> FieldInfoMap
|
|
-> InsObj
|
|
-> m ([PGCol], [S.SQLExp])
|
|
convObj prepFn defInsVals fieldInfoMap insObj = do
|
|
inpInsVals <- flip HM.traverseWithKey insObj $ \c val -> do
|
|
let relWhenPGErr = "relationships can't be inserted"
|
|
colType <- askPGType fieldInfoMap c relWhenPGErr
|
|
-- Encode aeson's value into prepared value
|
|
withPathK (getPGColTxt c) $ prepFn colType val
|
|
let sqlExps = HM.elems $ HM.union inpInsVals defInsVals
|
|
inpCols = HM.keys inpInsVals
|
|
|
|
return (inpCols, sqlExps)
|
|
|
|
buildConflictClause
|
|
:: (P1C m)
|
|
=> TableInfo
|
|
-> [PGCol]
|
|
-> OnConflict
|
|
-> m ConflictClauseP1
|
|
buildConflictClause tableInfo inpCols (OnConflict mTCol mTCons act) =
|
|
case (mTCol, mTCons, act) of
|
|
(Nothing, Nothing, CAIgnore) -> return $ CP1DoNothing Nothing
|
|
(Just col, Nothing, CAIgnore) -> do
|
|
validateCols col
|
|
return $ CP1DoNothing $ Just $ Column $ getPGCols col
|
|
(Nothing, Just cons, CAIgnore) -> do
|
|
validateConstraint cons
|
|
return $ CP1DoNothing $ Just $ Constraint cons
|
|
(Nothing, Nothing, CAUpdate) -> throw400 UnexpectedPayload
|
|
"Expecting 'constraint' or 'constraint_on' when the 'action' is 'update'"
|
|
(Just col, Nothing, CAUpdate) -> do
|
|
validateCols col
|
|
return $ CP1Update (Column $ getPGCols col) inpCols
|
|
(Nothing, Just cons, CAUpdate) -> do
|
|
validateConstraint cons
|
|
return $ CP1Update (Constraint cons) inpCols
|
|
(Just _, Just _, _) -> throw400 UnexpectedPayload
|
|
"'constraint' and 'constraint_on' cannot be set at a time"
|
|
where
|
|
fieldInfoMap = tiFieldInfoMap tableInfo
|
|
|
|
validateCols c = do
|
|
let targetcols = getPGCols c
|
|
void $ withPathK "constraint_on" $ indexedForM targetcols $
|
|
\pgCol -> askPGType fieldInfoMap pgCol ""
|
|
|
|
validateConstraint c = do
|
|
let tableConsNames = map tcName $ tiConstraints tableInfo
|
|
withPathK "constraint" $
|
|
unless (c `elem` tableConsNames) $
|
|
throw400 Unexpected $ "constraint " <> getConstraintTxt c
|
|
<<> " for table " <> tiName tableInfo
|
|
<<> " does not exist"
|
|
|
|
|
|
convInsertQuery
|
|
:: (P1C m)
|
|
=> (Value -> m [InsObj])
|
|
-> (PGColType -> Value -> m S.SQLExp)
|
|
-> InsertQuery
|
|
-> m InsertQueryP1
|
|
convInsertQuery objsParser prepFn (InsertQuery tableName val oC mRetCols) = do
|
|
|
|
insObjs <- objsParser val
|
|
|
|
-- Get the current table information
|
|
tableInfo <- askTabInfo tableName
|
|
|
|
-- If table is view then check if it is insertable
|
|
mutableView tableName viIsInsertable
|
|
(tiViewInfo tableInfo) "insertable"
|
|
|
|
-- Check if the role has insert permissions
|
|
insPerm <- askInsPermInfo tableInfo
|
|
|
|
-- Check if all dependent headers are present
|
|
validateHeaders $ ipiRequiredHeaders insPerm
|
|
|
|
let fieldInfoMap = tiFieldInfoMap tableInfo
|
|
|
|
-- convert the returning cols into sql returing exp
|
|
mAnnRetCols <- forM mRetCols $ \retCols -> do
|
|
-- Check if select is allowed only if you specify returning
|
|
selPerm <- modifyErr (<> selNecessaryMsg) $
|
|
askSelPermInfo tableInfo
|
|
|
|
withPathK "returning" $ checkRetCols fieldInfoMap selPerm retCols
|
|
|
|
let mutFlds = mkDefaultMutFlds tableName mAnnRetCols
|
|
|
|
let defInsVals = mkDefValMap fieldInfoMap
|
|
insCols = HM.keys defInsVals
|
|
insView = ipiView insPerm
|
|
|
|
insTuples <- withPathK "objects" $ indexedForM insObjs $ \obj ->
|
|
convObj prepFn defInsVals fieldInfoMap obj
|
|
let sqlExps = map snd insTuples
|
|
inpCols = HS.toList $ HS.fromList $ concatMap fst insTuples
|
|
|
|
conflictClause <- withPathK "on_conflict" $ forM oC $ \c -> do
|
|
roleName <- askCurRole
|
|
unless (ipiAllowUpsert insPerm) $ throw400 PermissionDenied $
|
|
"upsert is not allowed for role" <>> roleName
|
|
buildConflictClause tableInfo inpCols c
|
|
|
|
return $ InsertQueryP1 tableName insView insCols sqlExps
|
|
conflictClause mutFlds
|
|
|
|
where
|
|
selNecessaryMsg =
|
|
"; \"returning\" can only be used if the role has "
|
|
<> "\"select\" permission on the table"
|
|
|
|
decodeInsObjs :: (P1C m) => Value -> m [InsObj]
|
|
decodeInsObjs v = do
|
|
objs <- decodeValue v
|
|
when (null objs) $ throw400 UnexpectedPayload "objects should not be empty"
|
|
return objs
|
|
|
|
convInsQ :: InsertQuery -> P1 (InsertQueryP1, DS.Seq Q.PrepArg)
|
|
convInsQ insQ =
|
|
flip runStateT DS.empty $ convInsertQuery
|
|
(withPathK "objects" . decodeInsObjs) binRHSBuilder insQ
|
|
|
|
insertP2 :: (InsertQueryP1, DS.Seq Q.PrepArg) -> Q.TxE QErr RespBody
|
|
insertP2 (u, p) =
|
|
runIdentity . Q.getRow
|
|
<$> Q.rawQE dmlTxErrorHandler (Q.fromBuilder insertSQL) (toList p) True
|
|
where
|
|
insertSQL = toSQL $ mkSQLInsert u
|
|
|
|
data ConflictCtx
|
|
= CCUpdate !ConstraintName ![PGCol]
|
|
| CCDoNothing !(Maybe ConstraintName)
|
|
deriving (Show, Eq)
|
|
|
|
nonAdminInsert :: (InsertQueryP1, DS.Seq Q.PrepArg) -> Q.TxE QErr RespBody
|
|
nonAdminInsert (insQueryP1, args) = do
|
|
conflictCtxM <- mapM extractConflictCtx conflictClauseP1
|
|
setConflictCtx conflictCtxM
|
|
insertP2 (withoutConflictClause, args)
|
|
where
|
|
withoutConflictClause = insQueryP1{iqp1Conflict=Nothing}
|
|
conflictClauseP1 = iqp1Conflict insQueryP1
|
|
|
|
extractConflictCtx :: (MonadError QErr m) => ConflictClauseP1 -> m ConflictCtx
|
|
extractConflictCtx cp =
|
|
case cp of
|
|
(CP1DoNothing mConflictTar) -> do
|
|
mConstraintName <- mapM extractConstraintName mConflictTar
|
|
return $ CCDoNothing mConstraintName
|
|
(CP1Update conflictTar inpCols) -> do
|
|
constraintName <- extractConstraintName conflictTar
|
|
return $ CCUpdate constraintName inpCols
|
|
where
|
|
extractConstraintName (Constraint cn) = return cn
|
|
extractConstraintName _ = throw400 NotSupported
|
|
"\"constraint_on\" not supported for non admin insert. use \"constraint\" instead"
|
|
|
|
setConflictCtx :: Maybe ConflictCtx -> Q.TxE QErr ()
|
|
setConflictCtx conflictCtxM = do
|
|
let t = maybe "null" conflictCtxToJSON conflictCtxM
|
|
setVal = toSQL $ S.SELit t
|
|
setVar = "SET LOCAL hasura.conflict_clause = "
|
|
q = Q.fromBuilder $ setVar <> setVal
|
|
Q.unitQE defaultTxErrorHandler q () False
|
|
where
|
|
encToText = LT.toStrict . AT.encodeToLazyText
|
|
|
|
conflictCtxToJSON (CCDoNothing constrM) =
|
|
encToText $ InsertTxConflictCtx CAIgnore constrM Nothing
|
|
conflictCtxToJSON (CCUpdate constr updCols) =
|
|
encToText $ InsertTxConflictCtx CAUpdate (Just constr) $
|
|
Just $ toSQLTxt $ S.buildSEWithExcluded updCols
|
|
|
|
instance HDBQuery InsertQuery where
|
|
|
|
type Phase1Res InsertQuery = (InsertQueryP1, DS.Seq Q.PrepArg)
|
|
phaseOne = convInsQ
|
|
|
|
phaseTwo _ p1Res = do
|
|
role <- userRole <$> ask
|
|
liftTx $
|
|
bool (nonAdminInsert p1Res) (insertP2 p1Res) $ isAdmin role
|
|
|
|
schemaCachePolicy = SCPNoChange
|