Merge pull request #21 from Barberrrry/fix-pointer-nullable-validation

Fix custom validation of nullable pointer

Author: vpbarb

entities.go

@@ -134,6 +134,7 @@ func toPrimitiveType(fieldType types.TypeDef, validateTags types.ValidatableTags
 
 	if len(validateTags) == 1 &&
 		(validateTags.ContainsTag(types.SimpleTag{Name: types.PointerNotNullKey})) ||
+		(validateTags.ContainsTag(types.SimpleTag{Name: types.PointerNullableKey})) ||
 		(validateTags.ContainsTag(types.SimpleTag{Name: types.StructFuncKey})) {
 		return fieldType
 	}

examples/aliases/entities.go

@@ -30,11 +30,12 @@ type FloatType float64
 type MapType map[string]int
 
 type User struct {
-	FirstName      StringType  `validate:"min_len=2,max_len=15"`
-	LastName       string      `validate:"min_len=1,max_len=15"`
-	NonEmptyString StringType  `validate:"func=.ValidateNotEmpty"`
-	FamilyMembers  IntType     `validate:"min=1,max=100"`
-	SomeFloat      FloatType   `validate:"min=2.55,max=99.99"`
-	SomeMap        MapType     `validate:"min_items=2,key=[max_len=64],value=[min=-35,max=34]"`
-	SomePointer    *StringType `validate:"not_null,min_len=20,max_len=150"`
+	FirstName           StringType  `validate:"min_len=2,max_len=15"`
+	LastName            string      `validate:"min_len=1,max_len=15"`
+	NonEmptyString      StringType  `validate:"func=.ValidateNotEmpty"`
+	FamilyMembers       IntType     `validate:"min=1,max=100"`
+	SomeFloat           FloatType   `validate:"min=2.55,max=99.99"`
+	SomeMap             MapType     `validate:"min_items=2,key=[max_len=64],value=[min=-35,max=34]"`
+	SomePointer         *StringType `validate:"not_null,min_len=20,max_len=150"`
+	SomePointerNullable *StringType `validate:"nullable"`
 }

examples/aliases/entities_test.go

@@ -75,5 +75,24 @@ func Test_User_Validate(t *testing.T) {
 			require.NotNil(t, err)
 			assert.Equal(t, `[NonEmptyString: string is empty]`, err.Error())
 		})
+
+		t.Run("SomePointerNullable: valid", func(*testing.T) {
+			r := validUser
+			invalidString := StringType("aaaaaa")
+			r.SomePointerNullable = &invalidString
+
+			err := r.Validate()
+			require.NoError(t, err)
+		})
+
+		t.Run("SomePointerNullable: not valid", func(*testing.T) {
+			r := validUser
+			invalidString := StringType("a")
+			r.SomePointerNullable = &invalidString
+
+			err := r.Validate()
+			require.NotNil(t, err)
+			assert.Equal(t, `[SomePointerNullable: shorter than 3 chars]`, err.Error())
+		})
 	})
 }

examples/aliases/validators.go

@@ -93,5 +93,10 @@ func (r User) Validate() error {
 			errs.AddFieldf("SomePointer", "longer than 150 chars")
 		}
 	}
+	if r.SomePointerNullable != nil {
+		if err := r.SomePointerNullable.Validate(); err != nil {
+			errs.AddField("SomePointerNullable", err)
+		}
+	}
 	return errs.ErrorOrNil()
 }