Rails erb替代fields_for查找特定记录 [英] Rails erb alterantive to fields_for find specific record

问题描述

我是Rails的新手，正在尝试修改现有的应用程序.

I'm new to rails, and trying to modify an existing application.

我有一个与另一类型的记录"group_parameters"具有"has_many"关系的模型.组参数有两个字段(名称和值).

I have a model that has a 'has_many' relationship with another type of record 'group_parameters'. Group parameters has two fields (name and value).

我目前有一种形式，其范围为group_parameters并打印所有存储的记录.这是通过

I currently have a form that scopes group_parameters and prints all the stored records. This is achieved by doing

<%= f.fields_for group_parameters do | builder | %> Attribute <%= builder.text_field(:name) %> <% end %>

<%= f.fields_for group_parameters do | builder | %> Attribute <%= builder.text_field(:name) %> <% end %>

相反，我只想显示名称字段等于特定字符串的某些记录. 有一个简单的方法可以帮助您吗?

Instead I'd like to only display certain records where the name field equals a specific string. Is there a simple method to help with this?

推荐答案

<%= f.fields_for group_parameters, @specific_records do | builder | %> 
    Attribute <%=   builder.text_field(:name) %>
<% end %>

根据您的条件从数据库中获取数据并分配给@specific_records

Fetch data from DB as per your criteria and assign to @specific_records

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