paginate2.js

import faunadb, {query as q} from 'faunadb'

const client = new faunadb.Client({
  secret: "x"
});

// jasmine.DEFAULT_TIMEOUT_INTERVAL = 20000

async function runThese() {
  var edits = 20
  var timestamps = {}

  const newPost = await client.query(q.Create(q.Class("posts"), { data: { title: "Init" } }))
  const ref = newPost.ref
  console.log(newPost)
  for(var i=0; i < edits; i++){
    var edit = await client.query(q.Update(ref, { data: { title: "Edit " + (i+1) } }))
    timestamps[edit.ts] = edit.data.title
  }

  console.log(Object.values(timestamps))  // ['Edit 1','Edit 2','Edit 3','Edit 4','Edit 5','Edit 6','Edit 7','Edit 8','Edit 9','Edit 10','Edit 11','Edit 12','Edit 13','Edit 14','Edit 15','Edit 16','Edit 17','Edit 18','Edit 19','Edit 20']

  // Test1
  // I expect this to return [ 'Edit 19', 'Edit 20'] and it does.
  var Test1 = await client.query(q.Map(
    q.Paginate(ref, {events: true, size: 2}),
    function(event) {
      return q.Get(q.Select('resource', event), q.Select('ts', event))
    }
  ))
  console.log(timestamps[Test1.after.ts]) // Edit 16 (Should this be Edit 18?)
  console.log(Test1.before) // undefined
  console.log(Test1.data.map(item => item.data.title)) // [ 'Edit 19', 'Edit 20' ]

  // Test2 (after Test1.after.ts)
  // Based on Test1 I expect this to return [ 'Edit 17', 'Edit 18']. It does not...
  var Test2 = await client.query(q.Map(
    q.Paginate(ref, {events: true, size: 2, after: Test1.after.ts}),
    function(event) {
      return q.Get(q.Select('resource', event), q.Select('ts', event))
    }
  )).catch((e)=> console.log(e))

  console.log(timestamps[Test2.after.ts]) // Edit 17
  console.log(timestamps[Test2.before.ts]) // Edit 16
  console.log(Test2.data.map(item => item.data.title)) // ['Edit 19', 'Edit 20']

  // Test3 (before Test1.after.ts)
  // I don't know what to expect here. But not nothing...
  var Test3 = await client.query(q.Map(
    q.Paginate(ref, {events: true, size: 2, before: Test1.after.ts}),
    function(event) {
      return q.Get(q.Select('resource', event), q.Select('ts', event))
    }
  )).catch((e)=> console.log(e))

  console.log(timestamps[Test3.after.ts]) // Edit 16
  console.log(Test3.before) // undefined
  console.log(Test3.data.map(item => item.data.title)) // []

  // Test4 (after: 0)
  // I expect this to return [ 'Init', 'Edit 1']
  var Test4 = await client.query(q.Map(
    q.Paginate(ref, {events: true, size: 2, after: 0}),
    function(event) {
      return q.Get(q.Select('resource', event), q.Select('ts', event))
    }
  ))

  console.log(timestamps[Test4.after.ts]) // Edit 16
  console.log(Test4.before) // { ts: 0, action: 'create' }
  console.log(Test4.data.map(item => item.data.title)) // [ 'Edit 19', 'Edit 20' ]


  // Test5 (no size)
  // I expect this to return the default size 16
  var Test5 = await client.query(q.Map(
    q.Paginate(ref, {events: true}),
    function(event) {
      return q.Get(q.Select('resource', event), q.Select('ts', event))
    }
  ))

  console.log(Test5.data.length) // 21
}
runThese().catch((e) => console.log(e));