Flutter是否支持FieldPath？ [英] Is FieldPath supported in Flutter?

问题描述

我在 < FieldPath 中找不到code> cloud_firestore Flutter插件，但是，我认为这是一个非常通用的工具，将是此类插件的首批实现之一。

I could not find FieldPath in the cloud_firestore Flutter plugin, however, I would assume that this is a very common tool that would be one of the first implementations for such a plugin.

FieldValue 是最近添加的，但是在 FieldPath 上找不到任何内容。

如果我想使用查询中> documentId ，有没有办法实现？

FieldValue was recently added, but I could not find anything on FieldPath.
If I wanted to use the documentId in a query currently, would there be a way to achieve this?

推荐答案

我实际上忘记了这一点，但是我添加了 FieldPath.documentId 作为在某个时候向 cloud_firestore 的拉出请求。

I actually forgot about this, but I added FieldPath.documentId as part of a pull request to cloud_firestore at some point.

这意味着您可以简单地像这样使用它：

This means that you can simply use it like this:

Firestore.instance.collection('movies').orderBy('rating').orderBy(FieldPath.documentId);

过时

__ name __ 适用于，如果您想定位文档ID 。

Obsolent

__name__ works if you want to target the document id.

您可以将'__ name __'用作 String ，它等效于 FieldPath.documentId（）。

You can use '__name__' as a String, which is equivalent to FieldPath.documentId().

String fieldPathDocumentId = '__name__';

Firestore.instance.collection('movies').orderBy('rating').orderBy(fieldPathDocumentId);

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