to_json在Rails中返回字符串而不是json [英] to_json returns string instead of json in Rails

问题描述

下面这段代码应该返回一个json：

  @series = @ series.map do | serie | {
：name => serie.name，
：id => serie.id 
} 
 
 @ series.to_json 
  

返回如下：

 [{\name \：\Barra \，\ id \：3}，{\name \：\Botafogo 1 \，\id \：1}，{\name \：\ Botafogo 2 \，\id \：2}，{\name \：\Tijuca \，\id \：4}]
  

为什么它返回一个字符串而不是json？

'json'gem同时安装在我的.rb文件的顶部。

。出于某种原因 as_json 做我想要的，而不是 to_json 。我不明白为什么。如果我知道，我会更新我的答案。
奇怪的是，在将我的开发数据库表格sqlite 3更改为postgresql之前， to_json 工作正常。但我不认为这可能是问题所在，因为它与Heroku的postgre数据库配合得很好。

The following piece of code should return a json:

  @series = @series.map do |serie| {
    :name => serie.name,
    :id => serie.id
  }

  @series.to_json

It's return is the following:

"[{\"name\":\"Barra\",\"id\":3},{\"name\":\"Botafogo 1\",\"id\":1},{\"name\":\"Botafogo 2\",\"id\":2},{\"name\":\"Tijuca\",\"id\":4}]"

Why is it returning a string instead of a json?

'json' gem is both installed and required at the top of my .rb file

解决方案

I've just resolved my problem. For some reason as_json does what I want rather than to_json. I didn't quite understand why. I'll update my answer if I ever find out. That's strange, for to_json worked before I changed my development database form sqlite 3 to postgresql. But I don't think that might be the problem, because it was working nicely with Heroku's postgre database.

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