问题描述
在我的 Rails 应用程序中,我使用 MongoID 和 Elasticsearch 河流进行文本搜索.
In my Rails app I am using MongoID with a Elasticsearch river for text search.
对于 @devices_with_config = ConfigTextSearch.search params[:device_id]
我只想提取查询中匹配记录的 device_id
字段.在 mongoID 3.1.0
中,我可以只使用 Band.all.pluck(:name)
.但不幸的是,我坚持使用 3.0.23.
For @devices_with_config = ConfigTextSearch.search params[:device_id]
I want to extract just the device_id
fields for the matching records in the query. In mongoID 3.1.0
I could just use Band.all.pluck(:name)
. But unfortunately, I am stuck with 3.0.23.
我看到有一个类似的轻便摩托车表达式 collections[:bands].find.select(name: 1)
...但我是 Rails 新手,不知道该怎么做在控制器或模型中使用轻便摩托车表达式.
I see there is a similar moped expression collections[:bands].find.select(name: 1)
...but I am new to rails and can't figure out how I would use a moped expression in a controller or model.
关于如何在与 MongoId 匹配的情况下提取device_id"字段的任何想法?
Any Ideas on how I can just extract the 'device_id' field in matches with MongoId?
推荐答案
Mongoid 现在有一个 pluck
功能.
Mongoid has a pluck
function now.
这篇关于Rails Mongoid `pluck` 等价物?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!