如何在 Protocol Buffers 中构建数据模型

如何解决如何在 Protocol Buffers 中构建数据模型

例如，我需要一个这样的模型：

[
  {
    "type": "input","identity": "protocol_buffers_input","value": "Input Value","rules": {
      "required": true,"max_length": 100
    },"properties": {
      "label": "Input Controller","readonly": false,"default_value": "Input Default Value","width": "100%","placeholder": "Input Placeholder"
    },"business": {
      "client_visible": true,"disabled": false
    },"disabled": true
  },{
    "type": "select","identity": "protocol_buffers_select","value": ["key1","key2"],"rules": {
      "required": true
    },"properties": {
      "label": "Select Controller","default_value": ["key1","clear_able": true,"filterable": false,"options": [
        { "label": "label1","value": "key1" },{ "label": "label2","value": "key2" },{ "label": "label3","value": "key3" }
      ],"multiple": true,"placeholder": "Select Placeholder"
    },{
    "type": "switch","identity": "protocol_buffers_switch","value": true,"properties": {
      "label": "Switch Controller","default_value": true
    },{
    "type": "image","identity": "protocol_buffers_image","value": "","properties": {
      "label": "Image Controller","tip": "Image Controller Tips"
    },{
    "type": "number","identity": "protocol_buffers_number","value": 1,"rules": {
      "min_value": 0,"max_value": 100,"required": true
    },"properties": {
      "label": "Number Controller","default_value": 1,"step": 1,"placeholder": "Number Placeholder"
    },"disabled": true
  }
]

虽然input、select、switch、image、number对象同级，但对象的属性（值、规则、属性）存在差异。

如何在没有接口和继承机制的情况下建立相应的数据模型？将每个对象完全分开？

解决方法

文件结构

proto                   
├─ form                 
│  ├─ business.proto    
│  ├─ input.proto       
│  ├─ select.proto      
│  ├─ image.proto       
│  ├─ number.proto      
│  ├─ ...               
│  └─ switch.proto      
└─ items                
   └─ index.proto       

基本数据模型

// form/business.proto
syntax = "proto3";

package form;

message Business {
  bool client_visible = 1;
  bool disabled = 2;
}

// form/input.proto
syntax = "proto3";

package form;

import "form/business.proto";

message InputRules {
  bool required = 1;
  uint32 max_length = 2;
}

message InputProperties {
  string label = 1;
  bool readonly = 2;
  string default_value = 3;
  string width = 4;
  string placeholder = 5;
}

message Input {
  string type = 1;
  string identity = 2;
  string value = 3;
  InputRules rules = 4;
  InputProperties properties = 5;
  Business business = 6;
  bool disabled = 7;
}

// form/image.proto
syntax = "proto3";

package form;

import "form/business.proto";

message ImageRules {
  bool required = 1;
}

message ImageProperties {
  string label = 1;
  bool readonly = 2;
  string tip = 3;
}

message Image {
  string type = 1;
  string identity = 2;
  string value = 3;
  ImageRules rules = 4;
  ImageProperties properties = 5;
  Business business = 6;
  bool disabled = 7;
}

实体模型

// items/index.proto
syntax = "proto3";

package items;

import "form/input.proto";
import "form/textarea.proto";
import "form/radio.proto";
import "form/checkbox.proto";
import "form/select.proto";
import "form/date.proto";
import "form/switch.proto";
import "form/image.proto";
import "form/number.proto";

message Nested {
  uint32 id = 1;

  oneof items {
    form.Input input = 2;
    form.Textarea textarea = 3;
    form.Radio radio = 4;
    form.Checkbox checkbox = 5;
    form.Select select = 6;
    form.Date date = 7;
    form.Switch switch = 8;
    form.Image image = 9;
    form.Number number = 10;
  }
}

message SearchRequest {
  string query = 1;
  int32 page_number = 2;
  int32 per_page = 3;
}

message SearchResponse {
  repeated Nested items = 1;
}

service SearchService {
  rpc Search(SearchRequest) returns (SearchResponse);
}