Antoine Leblanc d66d2d81fd server: use placeholder to prevent empty query roots ... ### Description The GraphQL spec has to conflicting requirements: 1. an object must contain at least one field: the schema may not contain empty objects 2. the _query_root_ must always be present Given _1_, the schema generation code removes from the schema all fields that would result in empty objects, such as a table for which a user does not have select permissions. But, as a result, our code also potentially removes _query_root_ if it is empty, breaking _2_. This PR introduces a dummy "placeholder" field in the query root if it's empty, to ensure we never remove it from the schema. ### Remaining work - [x] changelog entry - [x] tests PR-URL: https://github.com/hasura/graphql-engine-mono/pull/148 GitOrigin-RevId: bfd6bfcc2f3de92900b6ba566012f093399ca037		2022-01-27 18:08:11 +00:00
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check_no_empty_roots.yaml	Prevent empty subscription roots (fix hasura/graphql-engine#6898)	2021-09-16 07:42:46 +00:00
select_placeholder.yaml	server: use placeholder to prevent empty query roots	2022-01-27 18:08:11 +00:00