René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"startAt to support key","articleBody":"\u003c!--\r\n\r\nIMPORTANT! YOU MUST FOLLOW THESE INSTRUCTIONS OR YOUR ISSUE WILL BE CLOSED.\r\n\r\nThank you for contributing to the Angular and Firebase communities!\r\n\r\nHave a usage question?\r\n=======================\r\nWe get lots of those and we love helping you, but GitHub is not the best place for them and they will be closed. Here are some resources to get help:\r\n\r\n- Go through the Developer's Guide: https://github.com/angular/angularfire2#developer-guide\r\n\r\nIf the official documentation doesn't help, try asking through our officially supported channels:\r\n\r\n- Firebase Google Group: https://groups.google.com/forum/#!forum/firebase-talk\r\n- Stack Overflow: https://stackoverflow.com/questions/tagged/angular (include the firebase and angularfire tags, too!)\r\n\r\n*Please avoid double posting across multiple channels!*\r\n\r\nThink you found a bug?\r\n=======================\r\nYeah, we're definitely not perfect! Please use the bug report template below and include a minimal repro when opening the issue.\r\n\r\nHave a feature request?\r\n========================\r\nGreat, we love hearing how we can improve our products! Remove the template below and\r\nprovide an explanation of your feature request. Provide code samples if applicable. Try to\r\nthink about what it will allow you to do that you can't do today? How will it make current\r\nworkarounds straightforward? What potential bugs and edge cases does it help to avoid?\r\n\r\n--\u003e\r\n\r\n\r\n### Version info\r\n\r\n\u003c!-- What versions of the following libraries are you using? Note that your issue may already\r\nbe fixed in the latest versions. --\u003e\r\n\r\n**Angular: 4.3.5**\r\n\r\n**Firebase: 4.3.0**\r\n\r\n**AngularFire: 4.0.0-rc.2**\r\n\r\n**Other (e.g. Ionic/Cordova, Node, browser, operating system): Chrome 60, Windows 7**\r\n\r\n### How to reproduce these conditions\r\n\r\n**Failing test unit, Plunkr, or JSFiddle demonstrating the problem**\r\n\r\n\u003c!-- \r\nProvide a failing test unit, or create a minimal, complete, and \r\nverifiable example (http://stackoverflow.com/help/mcve) using either \r\nPlunker (http://plnkr.co/) or JSFiddle (https://jsfiddle.net/).\r\n--\u003e\r\n\r\n**Steps to set up and reproduce**\r\nHave read a bit old issue #362 but I am raising here again with some info. For pagination, I need to use `startAt` with optional `key` combined with `orderByChild`.\r\n\r\nTo emulate the behavior that gets the next page content, I ran below code with some hard coded values found in my `notes` database and it gives me what I expected - two notes under 'Issues' group starting with the one with given key:\r\n```typescript\r\n    const query = this.db.database.ref('notes')\r\n      .orderByChild('group')\r\n      .limitToFirst(2)\r\n      .startAt('Issues', '-KqFzkJy-DCM7mmH3jo5');\r\n    query.on('child_added', (snap) =\u003e {\r\n      console.log(snap.val(), snap.key);\r\n    });\r\n```\r\n\r\nBut if run below code, I got nothing:\r\n```typescript\r\n    this.notes = this.db.list(`notes`, {\r\n      query: {\r\n        orderByChild: 'group',\r\n        equalTo: 'Issues',\r\n        limitToFirst: 2,\r\n        startAt: { value: 'Issues', key: '-KqFzkJy-DCM7mmH3jo5' } // need this feature..\r\n      }\r\n    });\r\n```\r\n\r\nIf I comment out `startAt` line above, it gives me first two notes under 'Issues' group.\r\n\r\n\u003c!-- detailed instructions to run your minimal repro or to recreate the environment --\u003e\r\n\r\n**Sample data and security rules**\r\n\r\n\u003c-- include/attach/link to some json sample data (or provide credentials to a sanitized, test Firebase project) --\u003e\r\n\r\n### Debug output\r\n\r\n** Errors in the JavaScript console **\r\n\r\n** Output from `firebase.database().enableLogging(true);` **\r\n\r\n** Screenshots **\r\n\r\n### Expected behavior\r\n\r\nGet the same result that Firebase SDK gives.\r\n\u003c!-- What is the expected behavior? --\u003e\r\n\r\n### Actual behavior\r\n\r\nNo console errors, no result.\r\n\u003c!-- What is the actual behavior? --\u003e\r\n","author":{"url":"https://github.com/bob-lee","@type":"Person","name":"bob-lee"},"datePublished":"2017-08-18T06:04:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/1114/angularfire/issues/1114"}