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package validator
import (
"github.com/vektah/gqlparser/v2/ast"
//nolint:revive // Validator rules each use dot imports for convenience.
. "github.com/vektah/gqlparser/v2/validator"
)
func init() {
AddRule("UniqueInputFieldNames", func(observers *Events, addError AddErrFunc) {
observers.OnValue(func(walker *Walker, value *ast.Value) {
if value.Kind != ast.ObjectValue {
return
}
seen := map[string]bool{}
for _, field := range value.Children {
if seen[field.Name] {
addError(
Message(`There can be only one input field named "%s".`, field.Name),
At(field.Position),
)
}
seen[field.Name] = true
}
})
})
}
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