传递状态时Apollo查询变量错误

Question

试图将我下面的状态[传递给Apollo查询中的变量，但出现以下400错误：

错误：网络错误：响应失败：收到状态码400

更新：

这是错误的详细信息：

[[GraphQL错误]：消息：类型为“ String！”的变量“ $ orderBy”。用于期望类型为“ ItemOrderByInput”的位置。，位置：[对象对象]，[对象对象]，路径：未定义

这是我正在使用的当前代码，这会给我带来错误。

试图获取

ALL_ITEMS_QUERY

以采用orderBy变量。我想念什么吗？

import React, { Component } from "react";
import { Query } from "react-apollo";
import gql from "graphql-tag";
import styled from "styled-components";
import Item from "./Item";
import Pagination from "./Pagination";
import { perPage } from "../config";
import Sort from "./Sort";

const ALL_ITEMS_QUERY = gql`
  query ALL_ITEMS_QUERY($skip: Int = 0, $first: Int = ${perPage}, $orderBy: String!) {
    items(first: $first, skip: $skip, orderBy: $orderBy) {
      id
      title
      price
      description
      image
      largeImage
    }
  }
`;

const Center = styled.div`
  text-align: center;
`;

const ItemsList = styled.div`
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 60px;
  max-width: ${props => props.theme.maxWidth};
  margin: 0 auto;
  padding-bottom: 80px;
`;

class Items extends Component {
  state = {
    sortNew: "createdAt_ASC"
  };

  render() {
    return (
      <Center>
        <Pagination page={this.props.page} />
        <Sort />

        <Query
          query={ALL_ITEMS_QUERY}
          variables={{
            orderBy: this.state.sortNew,
            skip: this.props.page * perPage - perPage
          }}
        >
          {({ data, error, loading }) => {
            if (loading) return <p>Loading...</p>;
            if (error) return <p>Error: {error.message}</p>;
            return (
              <ItemsList>
                {data.items.map(item => (
                  <Item item={item} key={item.id} />
                ))}
              </ItemsList>
            );
          }}
        </Query>
        <Pagination page={this.props.page} />
      </Center>
    );
  }
}

export default Items;

Answer 1

ALL_ITEMS_QUERY期望orderBy是一个像orderBy: createdAt_ASC这样的枚举，但是您要传递一个字符串orderBy: String!。要解决此问题，请将枚举名称传递给ALL_ITEMS_QUERY，这样就可以动态更改orderBy。

一个例子看起来像这样

const ALL_ITEMS_QUERY = gql`
  query ALL_ITEMS_QUERY($skip: Int = 0, $first: Int = ${perPage}, $orderBy: NameOfItemsEnum) {
    items(first: $first, skip: $skip, orderBy: $orderBy) {
      id
      title
      price
      description
      image
      largeImage
    }
  }
`;

其中NameOfItemsEnum是后端上枚举类型的名称