Paginated methods: Page token field

This rule enforces that all List and Search methods have a plural name repeatable field as a first field in the response message, as mandated in AIP-158.

Details

This rule looks at any message matching List*Response or Search*Response that has next_page_token field and complains if the first field’s name is not plural.

Examples

Incorrect code for this rule:

// Incorrect
message ListBooksResponse {
  // Field name should be `books`.
  repeated Book book = 1;
  string next_page_token = 2;
}

Correct code for this rule:

// Correct.
message ListBooksResponse {
  repeated Book books = 1;
  string next_page_token = 2;
}

Disabling

If you need to violate this rule, use a leading comment above the message or above the field. Remember to also include an aip.dev/not-precedent comment explaining why.

// (-- api-linter: core::0158::response-plural-first-field=disabled
//     aip.dev/not-precedent: We need to do this because reasons. --)
message ListBooksResponse {
  repeated Book book = 1;
  string next_page_token = 2;
}

If you need to violate this rule for an entire file, place the comment at the top of the file.