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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("ScalarLeafs", func(observers *Events, addError AddErrFunc) {
observers.OnField(func(walker *Walker, field *ast.Field) {
if field.Definition == nil {
return
}
fieldType := walker.Schema.Types[field.Definition.Type.Name()]
if fieldType == nil {
return
}
if fieldType.IsLeafType() && len(field.SelectionSet) > 0 {
addError(
Message(`Field "%s" must not have a selection since type "%s" has no subfields.`, field.Name, fieldType.Name),
At(field.Position),
)
}
if !fieldType.IsLeafType() && len(field.SelectionSet) == 0 {
addError(
Message(`Field "%s" of type "%s" must have a selection of subfields.`, field.Name, field.Definition.Type.String()),
Suggestf(`"%s { ... }"`, field.Name),
At(field.Position),
)
}
})
})
}
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