1package validator
 2
 3import (
 4	"github.com/vektah/gqlparser/ast"
 5	. "github.com/vektah/gqlparser/validator"
 6)
 7
 8func init() {
 9	AddRule("LoneAnonymousOperation", func(observers *Events, addError AddErrFunc) {
10		observers.OnOperation(func(walker *Walker, operation *ast.OperationDefinition) {
11			if operation.Name == "" && len(walker.Document.Operations) > 1 {
12				addError(
13					Message(`This anonymous operation must be the only defined operation.`),
14					At(operation.Position),
15				)
16			}
17		})
18	})
19}