Question

Playground的“查询变量”部分似乎需要JSON对象作为查询参数。使用Postgres，我们不能对字符串使用双引号，它必须是单引号。 Playground正在JSON中发送双引号。结果是错误和空响应。解决方法是什么？我已经尝试过像这样转义单引号，但是它不起作用，查询中的/显示：

{
  "user_name": "/'sjohns/'"
}

我的整数var查询有效。

查询：

query ($user_name: String!) {
    checkUserName(user_name: $user_name) {
        user_name
    }
 }

查询变量：

{
  "user_name": "sjohns"
}

从登录终端：

user_name in resolver:  sjohns
user_name in service:  sjohns
query: SELECT "Members"."member_id" AS ... other properties ...
  FROM "members" "Members" WHERE "Members"."user_name" = $1 
  -- PARAMETERS: ["sjohns"]

编辑：

模式：

type Query {
    getMembers: [Member]
    getMember(member_id: Int!): Member!
    checkUserName(user_name: String!): Member!

解析器：

async checkUserName(@Args('user_name') user_name: string) {
    console.log('user_name in resolver: ', user_name);  // Shown above.
    return await this.membersService.checkUserName(user_name);
  }

来自实体：

 @Column({ length: 50 })
  user_name: string;

错误，此用户名与我尝试过的其他用户一样在db中存在。它与REST一起使用。

{
  "errors": [
    {
      "message": "Cannot return null for non-nullable field Member.user_name.",
      "locations": [
        {
          "line": 3,
          "column": 5
        }
      ],
      "path": [
        "checkUserName",
        "user_name"
      ],
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "exception": {
          "stacktrace": [
            "Error: Cannot return null for non-nullable field Member.user_name.", ...

 "data": {
    "checkUserName": null
  }

GraphQL Playground查询JSON到Postgres-如何避免查询字符串中的双引号？

0 个答案: