对多个字段AngularFire查询 [英] AngularFire query on multiple fields

问题描述

我的工作，需要从火力地堡上的多个字段 选择数据的项目。

I'm working on a project which needs to select data from Firebase on multiple fields.

我有一个火力点数据库是这样的：

I have a firebase database like this:

[{
    date: "2016-01-29"
    done: false
    task: "hello world"
},
{
    date: "2016-01-29"
    done: false
    task: "hello world"
}]

现在我想查询是日期今天，所有的数据的完成是真实的。

Now I want to query all data with date is today and done is true.

我环顾四周谷歌一段时间，但没有什么工作。没有任何人能请帮我算出这个？

I look around google for a while but there's nothing work. Is there any one can please help me to figure this out?

推荐答案

您只能在具有火力地堡查询单个属性查询。因此，无论你需要做的过滤客户端的其余部分，或者你就必须将值组合成一个单一的date_done'属性。

You can only query on a single property with Firebase queries. So either you'll have to do the rest of the filtering client-side or you'll have to combine the values into a single 'date_done' property.

[{
    date: "2016-01-29",
    done: false,
    date_done: "2016-01-29_false",
    task: "hello world1"
},
{
    date: "2016-01-29",
    done: false,
    date_done: "2016-01-29_false",
    task: "hello world"
}]

现在，你可以得到所有的1月29日完成了与查询：

Now you can get all the queries that were done on January 29 with:

ref.orderByChild('date_done').equalTo('2016-01-29_true').on(...

有关的人谁问类似的问题更多信息，请参见：

For some more information from people who asked similar questions, see:

• NoSQL数据库设计与多重限制（火力地堡）
查询

• Query基于多凡在火力条款


• Firebase - 如何写多个orderByChild提取数据
？

• How做在火力地堡下面的查询？ （不止一个WHERE条件）


• Filter产品在火力地堡
多个子属性

• NoSQL database design for queries with multiple restrictions (Firebase)
• Query based on multiple where clauses in firebase
• Firebase - How do I write multiple orderByChild for extracting data?
• How to do the following query in Firebase? (more than one where condition)
• Filter products on multiple child properties in Firebase

这篇关于对多个字段AngularFire查询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！