graphql-engine/v3/crates/metadata-resolve
Daniel Chambers b1ee3ae1b8 Metadata resolve for aggregates over relationships (#731)
## Description
This PR continues on from #725 and adds the metadata resolve logic to
validate the usage of aggregates applied to relationships. The metadata
resolve logic is gated behind a new `enable_aggregate_relationships`
flag and disabled by default.

The new resolve logic lives in
`crates/metadata-resolve/src/stages/relationships/mod.rs`, however, most
of the actual logic that validates the usage of the aggregate expression
with the relationship has been reused from the model aggregate resolve
code. Subsequently, that code
(`crates/metadata-resolve/src/stages/models/aggregation.rs`) was
refactored to return a distinct error type
`ModelAggregateExpressionError` that can be composed with the
`RelationshipError` type, so the same errors can be returned with the
additional context of the relationship they were found in.

New metadata resolve error tests have been added in
`crates/metadata-resolve/tests/failing/aggregate_expression_in_relationship/*`.
Also, two new passing metadata resolve tests have been added to cover
the happy case of root field and relationship aggregate expressions:
`crates/metadata-resolve/tests/passing/aggregate_expressions/*`

JIRA: [V3ENGINE-160](https://hasurahq.atlassian.net/browse/V3ENGINE-160)

[V3ENGINE-160]:
https://hasurahq.atlassian.net/browse/V3ENGINE-160?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

V3_GIT_ORIGIN_REV_ID: 8cd7040cc9277940641d5ac239d7b34f8c1462c5
2024-06-21 01:08:54 +00:00
..
src Metadata resolve for aggregates over relationships (#731) 2024-06-21 01:08:54 +00:00
tests Metadata resolve for aggregates over relationships (#731) 2024-06-21 01:08:54 +00:00
Cargo.toml Move all dependency versions into the workspace file. (#734) 2024-06-20 12:25:55 +00:00