Question

我尝试将数组字符串化，因为我将其保存到我的mysql数据库中，并在检索时解析它，但我得到了＃34;字符串不能代表数组＆＃34;。是否可以使用sequelize更改getter中的类型，如果是这样，将如何完成？

choices: {
  type:Sequelize.TEXT,
  get(){
    var val = this.getDataValue('choices');
    return val ? JSON.parse(val):null;
  },
  set(val){
    if(val && typeof(val)!=='string'){
      val = JSON.stringify(val);
    }
    this.setDataValue('choices',val);
  }
},

Answer 1

这对sequelize或mysql来说不是问题。这是我的GraphQL突变的一个问题，我必须覆盖一个类型

import { attributeFields } from "graphql-sequelize";
import { GraphQLList, GraphQLString } from "graphql";
import { Question } from "../schemas/Question";
import ResponsePayload from "../schemas/ResponsePayload";
import _ from "lodash";

var base = _.assign(attributeFields(sequelize.models.question, {
  exclude: ["id", "createdAt", "updatedAt"]
}), { choices: { type: new GraphQLList(GraphQLString) }});

const CreateQuestion = {
  type: ResponsePayload,
  args: base,
  resolve: ...
};

export { CreateQuestion };

特别是我必须改变

var base = attributeFields(sequelize.models.question, {
  exclude: ["id", "createdAt", "updatedAt"]
});

到

var base = _.assign(attributeFields(sequelize.models.question, {
  exclude: ["id", "createdAt", "updatedAt"]
}), { choices: { type: new GraphQLList(GraphQLString) }});

这会覆盖选择的类型，在sequelize模型中定义为String，但就GraphQL而言，需要是一个数组。

更改getter中的类型 - 使用graphql进行续订

1 个答案: