mirror of
https://github.com/hasura/graphql-engine.git
synced 2024-12-17 04:24:35 +03:00
9ef603360c
Co-authored-by: Vamshi Surabhi <vamshi@hasura.io> Co-authored-by: Vladimir Ciobanu <admin@cvlad.info> Co-authored-by: Antoine Leblanc <antoine@hasura.io> Co-authored-by: Stylish Haskell Bot <stylish-haskell@users.noreply.github.com> GitOrigin-RevId: 9d631878037637f3ed2994b5d0525efd978f7b8f
499 lines
20 KiB
Haskell
499 lines
20 KiB
Haskell
{-# LANGUAGE AllowAmbiguousTypes #-}
|
||
{-# LANGUAGE Arrows #-}
|
||
|
||
-- | Description: Create/delete SQL tables to/from Hasura metadata.
|
||
module Hasura.RQL.DDL.Schema.Table
|
||
( TrackTable(..)
|
||
, runTrackTableQ
|
||
|
||
, TrackTableV2(..)
|
||
, runTrackTableV2Q
|
||
|
||
, UntrackTable(..)
|
||
, runUntrackTableQ
|
||
, dropTableInMetadata
|
||
|
||
, SetTableIsEnum(..)
|
||
, runSetExistingTableIsEnumQ
|
||
|
||
, SetTableCustomFields(..)
|
||
, runSetTableCustomFieldsQV2
|
||
|
||
, SetTableCustomization(..)
|
||
, runSetTableCustomization
|
||
|
||
, buildTableCache
|
||
, checkConflictingNode
|
||
) where
|
||
|
||
import Hasura.Prelude
|
||
|
||
import qualified Data.HashMap.Strict.Extended as Map
|
||
import qualified Data.HashMap.Strict.InsOrd as OMap
|
||
import qualified Data.HashSet as S
|
||
import qualified Language.GraphQL.Draft.Syntax as G
|
||
|
||
import Control.Arrow.Extended
|
||
import Control.Lens.Extended hiding ((.=))
|
||
import Control.Monad.Trans.Control (MonadBaseControl)
|
||
import Data.Aeson
|
||
import Data.Aeson.TH
|
||
import Data.Text.Extended
|
||
import Data.Typeable (cast)
|
||
|
||
import qualified Hasura.Incremental as Inc
|
||
|
||
import Hasura.Backends.Postgres.SQL.Types (FunctionName (..), QualifiedTable)
|
||
import Hasura.EncJSON
|
||
import Hasura.GraphQL.Context
|
||
import Hasura.GraphQL.Schema.Common (textToName)
|
||
import Hasura.RQL.DDL.Deps
|
||
import Hasura.RQL.DDL.Schema.Cache.Common
|
||
import Hasura.RQL.DDL.Schema.Common
|
||
import Hasura.RQL.DDL.Schema.Enum (resolveEnumReferences)
|
||
import Hasura.RQL.Types hiding (fmFunction)
|
||
import Hasura.Server.Utils
|
||
|
||
|
||
data TrackTable
|
||
= TrackTable
|
||
{ tSource :: !SourceName
|
||
, tName :: !QualifiedTable
|
||
, tIsEnum :: !Bool
|
||
} deriving (Show, Eq)
|
||
|
||
instance FromJSON TrackTable where
|
||
parseJSON v = withOptions <|> withoutOptions
|
||
where
|
||
withOptions = flip (withObject "TrackTable") v $ \o -> TrackTable
|
||
<$> o .:? "source" .!= defaultSource
|
||
<*> o .: "table"
|
||
<*> o .:? "is_enum" .!= False
|
||
withoutOptions = TrackTable defaultSource <$> parseJSON v <*> pure False
|
||
|
||
instance ToJSON TrackTable where
|
||
toJSON (TrackTable source name isEnum)
|
||
| isEnum = object [ "source" .= source, "table" .= name, "is_enum" .= isEnum ]
|
||
| otherwise = toJSON name
|
||
|
||
data SetTableIsEnum
|
||
= SetTableIsEnum
|
||
{ stieSource :: !SourceName
|
||
, stieTable :: !QualifiedTable
|
||
, stieIsEnum :: !Bool
|
||
} deriving (Show, Eq)
|
||
$(deriveToJSON hasuraJSON ''SetTableIsEnum)
|
||
|
||
instance FromJSON SetTableIsEnum where
|
||
parseJSON = withObject "Object" $ \o ->
|
||
SetTableIsEnum
|
||
<$> o .:? "source" .!= defaultSource
|
||
<*> o .: "table"
|
||
<*> o .: "is_enum"
|
||
|
||
data UntrackTable b =
|
||
UntrackTable
|
||
{ utSource :: !SourceName
|
||
, utTable :: !(TableName b)
|
||
, utCascade :: !Bool
|
||
} deriving (Generic)
|
||
deriving instance (Backend b) => Show (UntrackTable b)
|
||
deriving instance (Backend b) => Eq (UntrackTable b)
|
||
instance (Backend b) => ToJSON (UntrackTable b) where
|
||
toJSON = genericToJSON hasuraJSON{omitNothingFields=True}
|
||
|
||
instance (Backend b) => FromJSON (UntrackTable b) where
|
||
parseJSON = withObject "Object" $ \o ->
|
||
UntrackTable
|
||
<$> o .:? "source" .!= defaultSource
|
||
<*> o .: "table"
|
||
<*> o .:? "cascade" .!= False
|
||
|
||
isTableTracked :: SchemaCache -> SourceName -> QualifiedTable -> Bool
|
||
isTableTracked sc source tableName =
|
||
isJust $ unsafeTableInfo @'Postgres source tableName $ scPostgres sc
|
||
|
||
-- | Track table/view, Phase 1:
|
||
-- Validate table tracking operation. Fails if table is already being tracked,
|
||
-- or if a function with the same name is being tracked.
|
||
trackExistingTableOrViewP1 :: (QErrM m, CacheRWM m) => SourceName -> QualifiedTable -> m ()
|
||
trackExistingTableOrViewP1 source qt = do
|
||
rawSchemaCache <- askSchemaCache
|
||
when (isTableTracked rawSchemaCache source qt) $
|
||
throw400 AlreadyTracked $ "view/table already tracked : " <>> qt
|
||
let qf = fmap (FunctionName . toTxt) qt
|
||
when (isJust $ unsafeFunctionInfo @'Postgres source qf $ scPostgres rawSchemaCache) $
|
||
throw400 NotSupported $ "function with name " <> qt <<> " already exists"
|
||
|
||
-- | Check whether a given name would conflict with the current schema by doing
|
||
-- an internal introspection
|
||
checkConflictingNode
|
||
:: forall m. MonadError QErr m
|
||
=> SchemaCache
|
||
-> Text
|
||
-> m ()
|
||
checkConflictingNode sc tnGQL = do
|
||
let GQLContext queryParser _ = scUnauthenticatedGQLContext sc
|
||
-- {
|
||
-- __schema {
|
||
-- queryType {
|
||
-- fields {
|
||
-- name
|
||
-- }
|
||
-- }
|
||
-- }
|
||
-- }
|
||
introspectionQuery =
|
||
[ G.SelectionField $ G.Field Nothing $$(G.litName "__schema") mempty []
|
||
[ G.SelectionField $ G.Field Nothing $$(G.litName "queryType") mempty []
|
||
[ G.SelectionField $ G.Field Nothing $$(G.litName "fields") mempty []
|
||
[ G.SelectionField $ G.Field Nothing $$(G.litName "name") mempty []
|
||
[]
|
||
]
|
||
]
|
||
]
|
||
]
|
||
case queryParser introspectionQuery of
|
||
Left _ -> pure ()
|
||
Right (results, _reusability) -> do
|
||
case OMap.lookup $$(G.litName "__schema") results of
|
||
Just (RFRaw (Object schema)) -> do
|
||
let names = do
|
||
Object queryType <- Map.lookup "queryType" schema
|
||
Array fields <- Map.lookup "fields" queryType
|
||
traverse (\case Object field -> do
|
||
String name <- Map.lookup "name" field
|
||
pure name
|
||
_ -> Nothing) fields
|
||
case names of
|
||
Nothing -> pure ()
|
||
Just ns ->
|
||
if tnGQL `elem` ns
|
||
then throw400 RemoteSchemaConflicts $
|
||
"node " <> tnGQL <>
|
||
" already exists in current graphql schema"
|
||
else pure ()
|
||
_ -> pure ()
|
||
|
||
trackExistingTableOrViewP2
|
||
:: (MonadError QErr m, CacheRWM m, MetadataM m, BackendMetadata b)
|
||
=> SourceName -> TableName b -> Bool -> TableConfig b -> m EncJSON
|
||
trackExistingTableOrViewP2 source tableName isEnum config = do
|
||
sc <- askSchemaCache
|
||
{-
|
||
The next line does more than what it says on the tin. Removing the following
|
||
call to 'checkConflictingNode' causes memory usage to spike when newly
|
||
tracking a large amount (~100) of tables. The memory usage can be triggered
|
||
by first creating a large amount of tables through SQL, without tracking the
|
||
tables, and then clicking "track all" in the console. Curiously, this high
|
||
memory usage happens even when no substantial GraphQL schema is generated.
|
||
-}
|
||
checkConflictingNode sc $ snakeCaseTableName tableName
|
||
let metadata = mkTableMeta tableName isEnum config
|
||
buildSchemaCacheFor (MOSourceObjId source $ SMOTable tableName)
|
||
$ MetadataModifier
|
||
$ metaSources.ix source.toSourceMetadata.smTables %~ OMap.insert tableName metadata
|
||
pure successMsg
|
||
|
||
runTrackTableQ
|
||
:: (MonadError QErr m, CacheRWM m, MetadataM m) => TrackTable -> m EncJSON
|
||
runTrackTableQ (TrackTable source qt isEnum) = do
|
||
trackExistingTableOrViewP1 source qt
|
||
trackExistingTableOrViewP2 source qt isEnum emptyTableConfig
|
||
|
||
data TrackTableV2
|
||
= TrackTableV2
|
||
{ ttv2Table :: !TrackTable
|
||
, ttv2Configuration :: !(TableConfig 'Postgres)
|
||
} deriving (Show, Eq)
|
||
$(deriveToJSON hasuraJSON ''TrackTableV2)
|
||
|
||
instance FromJSON TrackTableV2 where
|
||
parseJSON = withObject "Object" $ \o -> do
|
||
table <- parseJSON $ Object o
|
||
configuration <- o .:? "configuration" .!= emptyTableConfig
|
||
pure $ TrackTableV2 table configuration
|
||
|
||
runTrackTableV2Q
|
||
:: (MonadError QErr m, CacheRWM m, MetadataM m) => TrackTableV2 -> m EncJSON
|
||
runTrackTableV2Q (TrackTableV2 (TrackTable source qt isEnum) config) = do
|
||
trackExistingTableOrViewP1 source qt
|
||
trackExistingTableOrViewP2 source qt isEnum config
|
||
|
||
runSetExistingTableIsEnumQ :: (MonadError QErr m, CacheRWM m, MetadataM m) => SetTableIsEnum -> m EncJSON
|
||
runSetExistingTableIsEnumQ (SetTableIsEnum source tableName isEnum) = do
|
||
void $ askTabInfo source tableName -- assert that table is tracked
|
||
buildSchemaCacheFor (MOSourceObjId source $ SMOTable tableName)
|
||
$ MetadataModifier
|
||
$ tableMetadataSetter source tableName.tmIsEnum .~ isEnum
|
||
return successMsg
|
||
|
||
data SetTableCustomization
|
||
= SetTableCustomization
|
||
{ _stcSource :: !SourceName
|
||
, _stcTable :: !QualifiedTable
|
||
, _stcConfiguration :: !(TableConfig 'Postgres)
|
||
} deriving (Show, Eq)
|
||
$(deriveToJSON hasuraJSON ''SetTableCustomization)
|
||
|
||
instance FromJSON SetTableCustomization where
|
||
parseJSON = withObject "Object" $ \o ->
|
||
SetTableCustomization
|
||
<$> o .:? "source" .!= defaultSource
|
||
<*> o .: "table"
|
||
<*> o .: "configuration"
|
||
|
||
data SetTableCustomFields
|
||
= SetTableCustomFields
|
||
{ _stcfSource :: !SourceName
|
||
, _stcfTable :: !QualifiedTable
|
||
, _stcfCustomRootFields :: !TableCustomRootFields
|
||
, _stcfCustomColumnNames :: !(CustomColumnNames 'Postgres)
|
||
} deriving (Show, Eq)
|
||
$(deriveToJSON hasuraJSON ''SetTableCustomFields)
|
||
|
||
instance FromJSON SetTableCustomFields where
|
||
parseJSON = withObject "SetTableCustomFields" $ \o ->
|
||
SetTableCustomFields
|
||
<$> o .:? "source" .!= defaultSource
|
||
<*> o .: "table"
|
||
<*> o .:? "custom_root_fields" .!= emptyCustomRootFields
|
||
<*> o .:? "custom_column_names" .!= Map.empty
|
||
|
||
runSetTableCustomFieldsQV2
|
||
:: (QErrM m, CacheRWM m, MetadataM m) => SetTableCustomFields -> m EncJSON
|
||
runSetTableCustomFieldsQV2 (SetTableCustomFields source tableName rootFields columnNames) = do
|
||
void $ askTabInfo source tableName -- assert that table is tracked
|
||
let tableConfig = TableConfig rootFields columnNames Nothing
|
||
buildSchemaCacheFor (MOSourceObjId source $ SMOTable tableName)
|
||
$ MetadataModifier
|
||
$ tableMetadataSetter source tableName.tmConfiguration .~ tableConfig
|
||
return successMsg
|
||
|
||
runSetTableCustomization
|
||
:: (QErrM m, CacheRWM m, MetadataM m) => SetTableCustomization -> m EncJSON
|
||
runSetTableCustomization (SetTableCustomization source table config) = do
|
||
void $ askTabInfo source table
|
||
buildSchemaCacheFor (MOSourceObjId source $ SMOTable table)
|
||
$ MetadataModifier
|
||
$ tableMetadataSetter source table.tmConfiguration .~ config
|
||
return successMsg
|
||
|
||
unTrackExistingTableOrViewP1
|
||
:: forall m b. (CacheRM m, QErrM m, Backend b) => UntrackTable b -> m ()
|
||
unTrackExistingTableOrViewP1 (UntrackTable source vn _) = do
|
||
schemaCache <- askSchemaCache
|
||
tableInfo <- unsafeTableInfo @b source vn (scPostgres schemaCache)
|
||
`onNothing` throw400 AlreadyUntracked ("view/table already untracked : " <>> vn)
|
||
when (isSystemDefined $ _tciSystemDefined $ _tiCoreInfo tableInfo) $
|
||
throw400 NotSupported $ vn <<> " is system defined, cannot untrack"
|
||
|
||
unTrackExistingTableOrViewP2
|
||
:: forall m b
|
||
. (CacheRWM m, QErrM m, MetadataM m, BackendMetadata b)
|
||
=> UntrackTable b -> m EncJSON
|
||
unTrackExistingTableOrViewP2 (UntrackTable source qtn cascade) = withNewInconsistentObjsCheck do
|
||
sc <- askSchemaCache
|
||
|
||
-- Get relational, query template and function dependants
|
||
let allDeps = getDependentObjs sc (SOSourceObj source $ SOITable qtn)
|
||
indirectDeps = mapMaybe getIndirectDep allDeps
|
||
-- Report bach with an error if cascade is not set
|
||
when (indirectDeps /= [] && not cascade) $ reportDepsExt (map (SOSourceObj source) indirectDeps) []
|
||
-- Purge all the dependents from state
|
||
metadataModifier <- execWriterT do
|
||
mapM_ (purgeDependentObject source >=> tell) indirectDeps
|
||
tell $ dropTableInMetadata source qtn
|
||
-- delete the table and its direct dependencies
|
||
buildSchemaCache metadataModifier
|
||
pure successMsg
|
||
where
|
||
getIndirectDep :: SchemaObjId -> Maybe (SourceObjId b)
|
||
getIndirectDep = \case
|
||
SOSourceObj s srcObjId ->
|
||
-- If the dependency is to any other source, it automatically is an
|
||
-- indirect dependency, hence the cast is safe here. However, we don't
|
||
-- have these cross source dependencies yet
|
||
cast srcObjId >>= \case
|
||
v@(SOITableObj dtn _) ->
|
||
if not (s == source && qtn == dtn) then Just v else Nothing
|
||
v -> Just v
|
||
_ -> Nothing
|
||
|
||
dropTableInMetadata :: (BackendMetadata b) => SourceName -> TableName b -> MetadataModifier
|
||
dropTableInMetadata source table =
|
||
MetadataModifier $ metaSources.ix source.toSourceMetadata.smTables %~ OMap.delete table
|
||
|
||
runUntrackTableQ
|
||
:: (CacheRWM m, QErrM m, MetadataM m, BackendMetadata b)
|
||
=> UntrackTable b -> m EncJSON
|
||
runUntrackTableQ q = do
|
||
unTrackExistingTableOrViewP1 q
|
||
unTrackExistingTableOrViewP2 q
|
||
|
||
-- | Builds an initial @'TableCache' 'ColumnInfo'@ from catalog information. Does not fill in
|
||
-- '_tiRolePermInfoMap' or '_tiEventTriggerInfoMap' at all, and '_tiFieldInfoMap' only contains
|
||
-- columns, not relationships; those pieces of information are filled in by later stages.
|
||
buildTableCache
|
||
:: forall arr m b
|
||
. ( ArrowChoice arr, Inc.ArrowDistribute arr, ArrowWriter (Seq CollectedInfo) arr
|
||
, Inc.ArrowCache m arr, MonadIO m, MonadBaseControl IO m, BackendMetadata b
|
||
)
|
||
=> ( SourceName
|
||
, SourceConfig b
|
||
, DBTablesMetadata b
|
||
, [TableBuildInput b]
|
||
, Inc.Dependency Inc.InvalidationKey
|
||
) `arr` Map.HashMap (TableName b) (TableCoreInfoG b (ColumnInfo b) (ColumnInfo b))
|
||
buildTableCache = Inc.cache proc (source, pgSourceConfig, pgTables, tableBuildInputs, reloadMetadataInvalidationKey) -> do
|
||
rawTableInfos <-
|
||
(| Inc.keyed (| withTable (\tables -> do
|
||
table <- noDuplicateTables -< tables
|
||
let maybeInfo = Map.lookup (_tbiName table) pgTables
|
||
buildRawTableInfo -< (table, maybeInfo, pgSourceConfig, reloadMetadataInvalidationKey)
|
||
)
|
||
|)
|
||
|) (withSourceInKey source $ Map.groupOnNE _tbiName tableBuildInputs)
|
||
let rawTableCache = removeSourceInKey $ Map.catMaybes rawTableInfos
|
||
enumTables = flip Map.mapMaybe rawTableCache \rawTableInfo ->
|
||
(,) <$> _tciPrimaryKey rawTableInfo <*> _tciEnumValues rawTableInfo
|
||
tableInfos <-
|
||
(| Inc.keyed (| withTable (\table -> processTableInfo -< (enumTables, table)) |)
|
||
|) (withSourceInKey source rawTableCache)
|
||
returnA -< removeSourceInKey (Map.catMaybes tableInfos)
|
||
where
|
||
withSourceInKey :: (Eq k, Hashable k) => SourceName -> HashMap k v -> HashMap (SourceName, k) v
|
||
withSourceInKey source = mapKeys (source,)
|
||
|
||
removeSourceInKey :: (Eq k, Hashable k) => HashMap (SourceName, k) v -> HashMap k v
|
||
removeSourceInKey = mapKeys snd
|
||
|
||
withTable :: ErrorA QErr arr (e, s) a -> arr (e, ((SourceName, TableName b), s)) (Maybe a)
|
||
withTable f = withRecordInconsistency f <<<
|
||
second (first $ arr \(source, name) -> MetadataObject (MOSourceObjId source $ SMOTable name) (toJSON name))
|
||
|
||
noDuplicateTables = proc tables -> case tables of
|
||
table :| [] -> returnA -< table
|
||
_ -> throwA -< err400 AlreadyExists "duplication definition for table"
|
||
|
||
-- Step 1: Build the raw table cache from metadata information.
|
||
buildRawTableInfo
|
||
:: ErrorA QErr arr
|
||
( TableBuildInput b
|
||
, Maybe (DBTableMetadata b)
|
||
, SourceConfig b
|
||
, Inc.Dependency Inc.InvalidationKey
|
||
) (TableCoreInfoG b (RawColumnInfo b) (Column b))
|
||
buildRawTableInfo = Inc.cache proc (tableBuildInput, maybeInfo, pgSourceConfig, reloadMetadataInvalidationKey) -> do
|
||
let TableBuildInput name isEnum config = tableBuildInput
|
||
metadataTable <-
|
||
(| onNothingA (throwA -<
|
||
err400 NotExists $ "no such table/view exists in postgres: " <>> name)
|
||
|) maybeInfo
|
||
|
||
let columns :: [RawColumnInfo b] = _ptmiColumns metadataTable
|
||
columnMap = mapFromL (FieldName . toTxt . prciName) columns
|
||
primaryKey = _ptmiPrimaryKey metadataTable
|
||
rawPrimaryKey <- liftEitherA -< traverse (resolvePrimaryKeyColumns columnMap) primaryKey
|
||
enumValues <- if isEnum
|
||
then do
|
||
-- We want to make sure we reload enum values whenever someone explicitly calls
|
||
-- `reload_metadata`.
|
||
Inc.dependOn -< reloadMetadataInvalidationKey
|
||
eitherEnums <- bindA -< fetchAndValidateEnumValues pgSourceConfig name rawPrimaryKey columns
|
||
liftEitherA -< Just <$> eitherEnums
|
||
else returnA -< Nothing
|
||
|
||
returnA -< TableCoreInfo
|
||
{ _tciName = name
|
||
, _tciSystemDefined = SystemDefined False
|
||
, _tciFieldInfoMap = columnMap
|
||
, _tciPrimaryKey = primaryKey
|
||
, _tciUniqueConstraints = _ptmiUniqueConstraints metadataTable
|
||
, _tciForeignKeys = S.map unForeignKeyMetadata $ _ptmiForeignKeys metadataTable
|
||
, _tciViewInfo = _ptmiViewInfo metadataTable
|
||
, _tciEnumValues = enumValues
|
||
, _tciCustomConfig = config
|
||
, _tciDescription = _ptmiDescription metadataTable
|
||
}
|
||
|
||
-- Step 2: Process the raw table cache to replace Postgres column types with logical column
|
||
-- types.
|
||
processTableInfo
|
||
:: ErrorA QErr arr
|
||
( Map.HashMap (TableName b) (PrimaryKey b (Column b), EnumValues)
|
||
, TableCoreInfoG b (RawColumnInfo b) (Column b)
|
||
) (TableCoreInfoG b (ColumnInfo b) (ColumnInfo b))
|
||
processTableInfo = proc (enumTables, rawInfo) -> liftEitherA -< do
|
||
let columns = _tciFieldInfoMap rawInfo
|
||
enumReferences = resolveEnumReferences enumTables (_tciForeignKeys rawInfo)
|
||
columnInfoMap <-
|
||
alignCustomColumnNames columns (_tcCustomColumnNames $ _tciCustomConfig rawInfo)
|
||
>>= traverse (processColumnInfo enumReferences (_tciName rawInfo))
|
||
assertNoDuplicateFieldNames (Map.elems columnInfoMap)
|
||
|
||
primaryKey <- traverse (resolvePrimaryKeyColumns columnInfoMap) (_tciPrimaryKey rawInfo)
|
||
pure rawInfo
|
||
{ _tciFieldInfoMap = columnInfoMap
|
||
, _tciPrimaryKey = primaryKey
|
||
}
|
||
|
||
resolvePrimaryKeyColumns
|
||
:: forall n a . (QErrM n) => HashMap FieldName a -> PrimaryKey b (Column b) -> n (PrimaryKey b a)
|
||
resolvePrimaryKeyColumns columnMap = traverseOf (pkColumns.traverse) \columnName ->
|
||
Map.lookup (FieldName (toTxt columnName)) columnMap
|
||
`onNothing` throw500 "column in primary key not in table!"
|
||
|
||
alignCustomColumnNames
|
||
:: (QErrM n)
|
||
=> FieldInfoMap (RawColumnInfo b)
|
||
-> CustomColumnNames b
|
||
-> n (FieldInfoMap (RawColumnInfo b, G.Name))
|
||
alignCustomColumnNames columns customNames = do
|
||
let customNamesByFieldName = mapKeys (fromCol @b) customNames
|
||
flip Map.traverseWithKey (align columns customNamesByFieldName) \columnName -> \case
|
||
This column -> (column,) <$> textToName (getFieldNameTxt columnName)
|
||
These column customName -> pure (column, customName)
|
||
That customName -> throw400 NotExists $ "the custom field name " <> customName
|
||
<<> " was given for the column " <> columnName <<> ", but no such column exists"
|
||
|
||
-- | “Processes” a '(RawColumnInfo 'Postgres)' into a 'PGColumnInfo' by resolving its type using a map of
|
||
-- known enum tables.
|
||
processColumnInfo
|
||
:: (QErrM n)
|
||
=> Map.HashMap (Column b) (NonEmpty (EnumReference b))
|
||
-> TableName b -- ^ the table this column belongs to
|
||
-> (RawColumnInfo b, G.Name)
|
||
-> n (ColumnInfo b)
|
||
processColumnInfo tableEnumReferences tableName (rawInfo, name) = do
|
||
resolvedType <- resolveColumnType
|
||
pure ColumnInfo
|
||
{ pgiColumn = pgCol
|
||
, pgiName = name
|
||
, pgiPosition = prciPosition rawInfo
|
||
, pgiType = resolvedType
|
||
, pgiIsNullable = prciIsNullable rawInfo
|
||
, pgiDescription = prciDescription rawInfo
|
||
}
|
||
where
|
||
pgCol = prciName rawInfo
|
||
resolveColumnType =
|
||
case Map.lookup pgCol tableEnumReferences of
|
||
-- no references? not an enum
|
||
Nothing -> pure $ ColumnScalar (prciType rawInfo)
|
||
-- one reference? is an enum
|
||
Just (enumReference:|[]) -> pure $ ColumnEnumReference enumReference
|
||
-- multiple referenced enums? the schema is strange, so let’s reject it
|
||
Just enumReferences -> throw400 ConstraintViolation
|
||
$ "column " <> prciName rawInfo <<> " in table " <> tableName
|
||
<<> " references multiple enum tables ("
|
||
<> commaSeparated (map (dquote . erTable) $ toList enumReferences) <> ")"
|
||
|
||
assertNoDuplicateFieldNames columns =
|
||
flip Map.traverseWithKey (Map.groupOn pgiName columns) \name columnsWithName ->
|
||
case columnsWithName of
|
||
one:two:more -> throw400 AlreadyExists $ "the definitions of columns "
|
||
<> englishList "and" (dquote . pgiColumn <$> (one:|two:more))
|
||
<> " are in conflict: they are mapped to the same field name, " <>> name
|
||
_ -> pure ()
|