option_string_len.proto

// Copyright 2023 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

import "buf/validate/validate.proto";

message User {
  string username = 1 [(buf.validate.field).string = {
    // `min_len` validates that username must have at least 3 characters.
    min_len: 3;
    // `max_len` validates that username must have at most 16 characters.
    max_len: 16;
  }];
  string description = 2 [(buf.validate.field).string = {
    // `min_bytes` specifies that a string field must have a least this many bytes.
    // In this case, it validates that description must have a least 0 byte,
    // which is a no-op.
    min_bytes: 0,
    // `max_bytes` specifies that a string field must have at most this many bytes.
    // In this case, it validates that description can have at most 500 bytes.
    max_bytes: 500
  }];
  // `len_bytes` specifies that a string field must have exactly this many bytes.
  // In this case, it validates that `id` must have exactly 20 bytes.
  string id = 3 [(buf.validate.field).string.len_bytes = 20];
  // `len` specifies that a string field must have exactly this many characters.
  // In this case, it validates that `abbreviation` must have exactly 3 characters.
  string abbreviation = 4 [(buf.validate.field).string.len = 3];
}