How to get information from different objects with 1 call?

问题

I need to have list of tags with 3 fields:

tag_name
tag_description
counter_of_posts.

Since counter_of_posts is a field of tag-object and tag_description (excerpt) is a field of tag_wiki, how can I get needed information with one call?

回答1:

This is impossible - you need at least 2 calls (more if you have more than 20 tags). One call to /api.stackexchange.com/2.2/tags/tag_names/info?order=desc&sort=popular&site=sitename to get the tag's name (which is given) and the counter and one to api.stackexchange.com/2.2/tags/tag_names/wikis?site=stackoverflow. Of course, you can apply whatever filters you want and change the sitename and tag names. Here's a JavaScript sample:

const key = ''; // &key=xxxx - not necessary, but it increases daily API quota from 300 to 10000
const sitename = 'stackoverflow'; // default, change it to whatever you want
const tags = 'php;javascript;java;jquery;perl;python'; // semicolon-separated, must be =<20

// First API call: get tag name and counter
$.get(`//api.stackexchange.com/2.2/tags/${tags}/info?order=desc&sort=popular&site=${sitename}&filter=!-.G.68pp778y${key}`,
  function(data_counter) {

    // Second API Call: get tag's excerpt
    $.get(`//api.stackexchange.com/2.2/tags/${tags}/wikis?site=${sitename}&filter=!*Ly1)NvM)n91RtK*${key}`,

      function(data_excerpt) {
        for (let i = 0; i < data_counter.items.length; i++) {
          $('table').append(`
            <tr>
              <td>${data_counter.items[i].name}</td>
              <td>${data_excerpt.items.find(name => name.tag_name === data_counter.items[i].name).excerpt}</td>
              <td>${data_counter.items[i].count}</td>
            </tr>
          `);
        }
        $('#quota').html(`API Quota remaining: ${data_excerpt.quota_remaining}`);
      }
    )
  }
)

table, p {
  font-family: sans-serif;
  border-collapse: collapse;
}

td, th {
  border: 1px solid #2d2d2d;
  padding: 4px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table>
  <tbody>
    <tr>
      <th>Tag Name</th>
      <th>Excerpt</th>
      <th>Number of posts</th>
    </tr>
  </tbody>
</table>
<p id="quota"></p>

来源：https://stackoverflow.com/questions/61055161/how-to-get-information-from-different-objects-with-1-call

标签

stackexchange-api