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## Description This PR removes `MetadataStorageT`, and cleans up all top-level error handling. In short: this PR changes `MonadMetadataStorage` to explicitly return a bunch of `Either QErr a`, instead of relying on the stack providing a `MonadError QErr`. Since we implement that class on the base monad *below any ExceptT*, this removes a lot of very complicated instances that make assumptions about the shape of the stack. On the back of this, we can remove several layers of ExceptT from the core of the code, including the one in `RunT`, which allows us to remove several instances of `liftEitherM . runExceptT`. PR-URL: https://github.com/hasura/graphql-engine-mono/pull/7689 GitOrigin-RevId: 97d600154d690f58c0b93fb4cc2d30fd383fd8b8
64 lines
1.7 KiB
Haskell
64 lines
1.7 KiB
Haskell
module Hasura.RQL.DDL.Endpoint
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( runCreateEndpoint,
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runDropEndpoint,
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dropEndpointInMetadata,
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)
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where
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import Data.HashMap.Strict.InsOrd qualified as OMap
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import Data.Text.Extended
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import Hasura.Base.Error
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import Hasura.EncJSON
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import Hasura.Prelude
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import Hasura.RQL.Types.Common
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import Hasura.RQL.Types.Endpoint
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import Hasura.RQL.Types.Metadata
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import Hasura.RQL.Types.Metadata.Object
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import Hasura.RQL.Types.SchemaCache.Build
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runCreateEndpoint ::
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( MonadError QErr m,
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CacheRWM m,
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MetadataM m
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) =>
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CreateEndpoint ->
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m EncJSON
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runCreateEndpoint endpoint@EndpointMetadata {..} = do
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endpointsMap <- _metaRestEndpoints <$> getMetadata
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OMap.lookup _ceName endpointsMap `for_` \_ ->
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throw400 AlreadyExists $
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"Endpoint with name: " <> toTxt _ceName <> " already exists"
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withNewInconsistentObjsCheck $
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buildSchemaCacheFor (MOEndpoint _ceName) $
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MetadataModifier $
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metaRestEndpoints %~ OMap.insert _ceName endpoint
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return successMsg
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runDropEndpoint ::
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( MonadError QErr m,
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CacheRWM m,
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MetadataM m
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) =>
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DropEndpoint ->
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m EncJSON
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runDropEndpoint DropEndpoint {..} = do
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checkExists _deName
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withNewInconsistentObjsCheck $
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buildSchemaCache $
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dropEndpointInMetadata _deName
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return successMsg
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dropEndpointInMetadata :: EndpointName -> MetadataModifier
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dropEndpointInMetadata name =
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MetadataModifier $ metaRestEndpoints %~ OMap.delete name
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checkExists :: (MetadataM m, MonadError QErr m) => EndpointName -> m ()
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checkExists name = do
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endpointsMap <- _metaRestEndpoints <$> getMetadata
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void $
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onNothing (OMap.lookup name endpointsMap) $
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throw400 NotExists $
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"endpoint with name: " <> toTxt name <> " does not exist"
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