执行突变时出现错误 400 graphql 和 apollo 客户端

Question

I'm following Javascript Everywhere tutorial. Building note app using reactjs and graphQL. Now I'm working with CRUD. Query and Create Note (mutation) works perfectly, but when i'm doing update mutation, it's return 400 error Bad request. Here's my code.

editNote pages

editNote.js

import React from 'react';
import { useMutation, useQuery } from '@apollo/client';

// import the NoteForm component
import NoteForm from '../components/NoteForm';
import { GET_NOTE, GET_ME } from '../gql/query';
import { EDIT_NOTE } from '../gql/mutation';

const EditNote = props => {
  // store the id found in the url as a variable
  const id = props.match.params.id;
  // define our note query
  const { loading, error, data } = useQuery(GET_NOTE, { variables: { id } });
  // fetch the current user's data
  const { data: userdata } = useQuery(GET_ME);
  // define our mutation
  const [editNote] = useMutation(EDIT_NOTE, {
    variables: {
      id
    },
    onCompleted: () => {
      props.history.push(`/note/${id}`);
    }
  });

  // if the data is loading, display a loading message
  if (loading) return 'Loading...';
  // if there is an error fetching the data, display an error message
  if (error) return <p>Error!</p>;
  // if the current user and the author of the note do not match
  if (userdata.me.id !== data.note.author.id) {
    return <p>You do not have access to edit this note</p>;
  }

  // pass the data and mutation to the form component
  return <NoteForm content={data.note.content} action={editNote} />;
};

export default EditNote;

NoteForm for updating note

NoteForm.js

import React, { useState } from 'react';
import styled from 'styled-components';

import Button from './Button';

const Wrapper = styled.div`
  height: 100%;
`;

const Form = styled.form`
  height: 100%;
`;

const TextArea = styled.textarea`
  width: 100%;
  height: 90%;
`;

const NoteForm = props => {
  // set the default state of the form
  const [value, setValue] = useState({ content: props.content || '' });

  // update the state when a user types in the form
  const onChange = event => {
    setValue({
      ...value,
      [event.target.name]: event.target.value
    });
  };

  return (
    <Wrapper>
      <Form
        onSubmit={e => {
          e.preventDefault();
          props.action({
            variables: {
              ...value
            }
          });
        }}
      >
        <TextArea
          required
          type="text"
          name="content"
          placeholder="Note content"
          value={value.content}
          onChange={onChange}
        />
        <Button type="submit">Save</Button>
      </Form>
    </Wrapper>
  );
};

export default NoteForm;

and here is my mutation updateNote.

mutation.js

const EDIT_NOTE = gql`
  mutation updateNote($id: ID!, $content: String!) {
    updateNote(id: $id, content: $content) {
      id
      content
      createdAt
      favoriteCount
      favoritedBy {
        id
        username
      }
      author {
        username
        id
      }
    }
  }
`;

Error information.

I'm just beginner using apollo client and graphql, i don't have any idea. Any help will be appreciated. Thankyou.

Answer 1

NoteForm.js

...
const onChange = event => {
    setValue({
      ...value,
      [event.target.name]: event.target.value /// problem here
    });
  };
...

you should pass correct variables, in gql file I see you declare $id and $content, make sure you pass "id" to mutation

example: editNote.js

...
return <NoteForm id={id} content={data.note.content} action={editNote} />;
...

NoteForm.js

...
const [value, setValue] = useState({ 
   id: props.id,
   content: props.content || '' 
});
...