1package validator
 2
 3import (
 4	"github.com/vektah/gqlparser/ast"
 5	. "github.com/vektah/gqlparser/validator"
 6)
 7
 8func init() {
 9	AddRule("ProvidedRequiredArguments", func(observers *Events, addError AddErrFunc) {
10
11		observers.OnField(func(walker *Walker, field *ast.Field) {
12			if field.Definition == nil {
13				return
14			}
15
16		argDef:
17			for _, argDef := range field.Definition.Arguments {
18				if !argDef.Type.NonNull {
19					continue
20				}
21				if argDef.DefaultValue != nil {
22					continue
23				}
24				for _, arg := range field.Arguments {
25					if arg.Name == argDef.Name {
26						continue argDef
27					}
28				}
29
30				addError(
31					Message(`Field "%s" argument "%s" of type "%s" is required but not provided.`, field.Name, argDef.Name, argDef.Type.String()),
32					At(field.Position),
33				)
34			}
35		})
36
37		observers.OnDirective(func(walker *Walker, directive *ast.Directive) {
38			if directive.Definition == nil {
39				return
40			}
41
42		argDef:
43			for _, argDef := range directive.Definition.Arguments {
44				if !argDef.Type.NonNull {
45					continue
46				}
47				if argDef.DefaultValue != nil {
48					continue
49				}
50				for _, arg := range directive.Arguments {
51					if arg.Name == argDef.Name {
52						continue argDef
53					}
54				}
55
56				addError(
57					Message(`Directive "@%s" argument "%s" of type "%s" is required but not provided.`, directive.Definition.Name, argDef.Name, argDef.Type.String()),
58					At(directive.Position),
59				)
60			}
61		})
62	})
63}