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* entc/gen/template/dialect/sql: cleaning up isSQLConstraintError in generated ent.go to use new sqlgraph IsConstraintError checks. Adding IsFK and IsUniqueness methods to the generated ent.ConstraintError (on SQL dialects) struct to allow users to glean more information about the specific constraint violation. Fixes #1310 * fix indentation in tmpl file regen files rm new methods from generated code * regen
City-Street Unique Index Example
In this example, we have a City with many Streets, and we want to set the
street name to be unique under each city.
Generate Assets
go generate ./...
Run Example
go test