如何从 axios 响应对象中的所有项目中提取特定值到 aa vuex 状态

Question

This is driving me nuts!

I have got an axios call returning an json array object in console - Check!

>(100) [{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]
>0:
id: 54892250
iid: 1001
ref: "master"
sha: "63e3fc014e207dd4e708749cee3e89a1aa416b7d"
created_at: "2020-03-05T18:57:02.793Z"
updated_at: "2020-03-05T19:06:27.651Z"
>user: {id: someuserid, name: "someuser", username: "someusername", state: "active", avatar_url: "https://assets.gitlab-static.net/uploads/-/system/user/avatar/4534925/avatar.png", …}
>environment: {id: 123456, name: "somename", slug: "somename-iw5iqp", external_url: "https://someaddress.com"}
>deployable: {id: someid, status: "success", stage: "deploy", name: "deploy-staging", ref: "master", …}
status: "success"
__proto__: Object
>1: {id: 54804365, iid: 1000, ref: "filter-out-expired-items", sha: "6225d8018c86fa906063aeea5c10c710ddced14c", created_at: "2020-03-05T12:25:18.949Z", …}
>2: {id: 54804175, iid: 999, ref: "master", sha: "aa5e50c50ba95e9b16cbc57fb968bf9075c625b2", created_at: "2020-03-05T12:24:02.284Z", …}
>3: {id: 54801934, iid: 998, ref: "filter-out-expired-items", sha: "4fc2

Now I need to do 2 things with this result:

1. when fully expanded this response is large - and there are thousands of them. Rather than store 1000s of giant json reponses in a vuex state - I want to first only extract the values we care about which are the following:
   • id
   • ref
   • environment.name
   • status
   • deployable.tag

to something like:

{ "id": id, "ref": ref, "environment": environment.name, "status": status, "tag": deployable.tag, }

How do I do this?

2. This response is paginated over many pages above is just a partial sample from one page's results.

I have a working loop for that and I am getting the console.log for all of them. BUT what I need to do is concatenate all pages (now stripped to the above fields) before I commit to the state. If have tried object copies, pushing to arrays and all kinds of utils promising the world - but I cannot get any of them working :)

So in summary:

1. get a page's results
2. squash item in the array to a simplified version
3. collect them all into a object I can insert into the state

Relevant part of the loop

  // Use headers to get the number of pages
  const pages = await axios.head(url, options)
    .then((response) => response.headers['x-total-pages']);
  console.log('pages=', pages); // DEBUG
  // Loop through and push them to an array
  for (let i = 0; i <= pages; i += 1) {
    console.log('i=', i);
    options = {
      headers: {
        'Private-Token': token,
      },
      params: {
        order_by: 'created_at',
        sort: 'desc',
        per_page: 100,
        page: i,
      },
    };
    axios.get(url, options)
      .then((result) => { console.log(result.data); })
  }

Answer 1

Create an array for the total results:

const results = [];

Where you're logging, parse each individual result:

result.data.forEach(item => {
  results.push({
     id: item.id,
     ref: item.ref,
     environment: item.environment.name,
     status: item.status,
     tag: item.deployable.tag
  });
});

Note that it may be a performance optimization to use a normal for loop instead of forEach .

Answer 2

I think you could use Promise to keep the Order of requests, hence the Sorting in across pages data. The key is to put each axios call into an array, and then call Promise.all([]) with that array to get all reponses all at once in the original order you made the requests.

// Use headers to get the number of pages
const pages = await axios.head(url, options)
.then((response) => response.headers['x-total-pages']);
console.log('pages=', pages); // DEBUG

let promises = [];

// Loop through and push them to an array
for (let i = 0; i <= pages; i += 1) {
  console.log('i=', i);
  options = {
    headers: {
      'Private-Token': token,
    },
    params: {
      order_by: 'created_at',
      sort: 'desc',
      per_page: 100,
      page: i,
    },
  };

  let promise = axios.get(url, options);
  // this below keep responses order
  promises.push(promise);
}

// This wait for all Axios calls to be resolved as promise
Promise.all(promises)
  .then((result) => {
    // now if you have 10 pages, you'll have result[0] to result[9], each of them is an axios response
    console.log(result[0].data);
    console.log(result[1].data); // if pages > 0

    let items = []; // you can declare it outside too for Scope access
    for (let i = 0; i <= pages; i += 1) {
      // so many records, then take the minimum info
      if (result[i].data.length >= 1000) {
        result[i].data.forEach(item => {
          items.push({
            id: item.id,
            ref: item.ref,
            environment: item.environment.name,
            status: item.status,
            tag: item.deployable.tag
          });
        }
      } else {
        // Not so many records then take all info
        items = items.concat(result[i]);
      }
    }

    // TODO: do whatever you want with the items array now

  });

Answer 3

I would use Array.prototype.map here to map the original objects into simplified ones with only a subset of the properties:

const newResult = result.data.map(d => ({
                                   id: d.id,
                                   ref: d.ref,
                                   environmentName: d.environment.name,
                                   status: d.deployable.status,
                                   deployableTag: d.deployable.tag
                                 }))

 const data = [ { "created_at": "2016-08-11T07:36:40.222Z", "updated_at": "2016-08-11T07:38:12.414Z", "deployable": { "commit": { "author_email": "admin@example.com", "author_name": "Administrator", "created_at": "2016-08-11T09:36:01.000+02:00", "id": "99d03678b90d914dbb1b109132516d71a4a03ea8", "message": "Merge branch 'new-title' into 'master'\\r\\n\\r\\nUpdate README\\r\\n\\r\\n\\r\\n\\r\\nSee merge request !1", "short_id": "99d03678", "title": "Merge branch 'new-title' into 'master'\\r" }, "coverage": null, "created_at": "2016-08-11T07:36:27.357Z", "finished_at": "2016-08-11T07:36:39.851Z", "id": 657, "name": "deploy", "ref": "master", "runner": null, "stage": "deploy", "started_at": null, "status": "success", "tag": false, "user": { "id": 1, "name": "Administrator", "username": "root", "state": "active", "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon", "web_url": "http://gitlab.dev/root", "created_at": "2015-12-21T13:14:24.077Z", "bio": null, "location": null, "public_email": "", "skype": "", "linkedin": "", "twitter": "", "website_url": "", "organization": "" }, "pipeline": { "created_at": "2016-08-11T02:12:10.222Z", "id": 36, "ref": "master", "sha": "99d03678b90d914dbb1b109132516d71a4a03ea8", "status": "success", "updated_at": "2016-08-11T02:12:10.222Z", "web_url": "http://gitlab.dev/root/project/pipelines/12" } }, "environment": { "external_url": "https://about.gitlab.com", "id": 9, "name": "production" }, "id": 41, "iid": 1, "ref": "master", "sha": "99d03678b90d914dbb1b109132516d71a4a03ea8", "user": { "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon", "id": 1, "name": "Administrator", "state": "active", "username": "root", "web_url": "http://localhost:3000/root" } }, { "created_at": "2016-08-11T11:32:35.444Z", "updated_at": "2016-08-11T11:34:01.123Z", "deployable": { "commit": { "author_email": "admin@example.com", "author_name": "Administrator", "created_at": "2016-08-11T13:28:26.000+02:00", "id": "a91957a858320c0e17f3a0eca7cfacbff50ea29a", "message": "Merge branch 'rename-readme' into 'master'\\r\\n\\r\\nRename README\\r\\n\\r\\n\\r\\n\\r\\nSee merge request !2", "short_id": "a91957a8", "title": "Merge branch 'rename-readme' into 'master'\\r" }, "coverage": null, "created_at": "2016-08-11T11:32:24.456Z", "finished_at": "2016-08-11T11:32:35.145Z", "id": 664, "name": "deploy", "ref": "master", "runner": null, "stage": "deploy", "started_at": null, "status": "success", "tag": false, "user": { "id": 1, "name": "Administrator", "username": "root", "state": "active", "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon", "web_url": "http://gitlab.dev/root", "created_at": "2015-12-21T13:14:24.077Z", "bio": null, "location": null, "public_email": "", "skype": "", "linkedin": "", "twitter": "", "website_url": "", "organization": "" }, "pipeline": { "created_at": "2016-08-11T07:43:52.143Z", "id": 37, "ref": "master", "sha": "a91957a858320c0e17f3a0eca7cfacbff50ea29a", "status": "success", "updated_at": "2016-08-11T07:43:52.143Z", "web_url": "http://gitlab.dev/root/project/pipelines/13" } }, "environment": { "external_url": "https://about.gitlab.com", "id": 9, "name": "production" }, "id": 42, "iid": 2, "ref": "master", "sha": "a91957a858320c0e17f3a0eca7cfacbff50ea29a", "user": { "avatar_url": "http://www.gravatar.com/avatar/e64c7d89f26bd1972efa854d13d7dd61?s=80&d=identicon", "id": 1, "name": "Administrator", "state": "active", "username": "root", "web_url": "http://localhost:3000/root" } } ] const result = data.map(d => ({ id: d.id, ref: d.ref, environmentName: d.environment.name, status: d.deployable.status, deployableTag: d.deployable.tag })) console.log(result)