关于 ruby??:ActiveRecord joins throwing Column in where 子句是不明确的错误 – Rails 5.1

ActiveRecord joins throwing Column in where clause is ambiguous error - Rails 5.1

我正在开发一个 Rails 5.1 项目，该项目需要通过记录字段的值以及连接的 Category 记录的存在来索引和搜索 Project 记录(Project 拥有并属于许多Category).

我有一个带有 search 动作的 SearchController，其中包含一个收集搜索参数的表单。在表单中，我有一个名称参数的输入和一个类别的选择。搜索成功运行，除非搜索返回 0 个结果，当有结果返回时一切正常。在不应该有结果的情况下，ActiveRecord 会抛出错误：

Mysql2::Error: Column 'name' in where clause is ambiguous: SELECT COUNT(*) FROM `projects` INNER JOIN `categories_projects` ON `categories_projects`.`project_id` = `projects`.`id` INNER JOIN `categories` ON `categories`.`id` = `categories_projects`.`category_id` WHERE (name LIKE '%something%') AND `categories`.`id` = 1

有什么可能导致这种情况的想法吗？

项目模型

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class Project < ApplicationRecord
has_and_belongs_to_many :categories
end

类别模型

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class Category < ApplicationRecord
has_and_belongs_to_many :projects
end

搜索控制器

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class SearchController < ApplicationController
def search
projects = Project.all
projects = projects.where('name LIKE ?',"%#{params[:name]}%") if params[:name].present?
projects = projects.joins(:categories).where(categories: { id: params[:category_id] }) if params[:category_id].present?
@projects = projects
end
end

路线

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Rails.application.routes.draw do
...

get"search", to:"search#search"

...
end

查看

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Search
<%= form_tag(search_path, method: :get) do %>
<%= label_tag :name %>
<%= text_field_tag :name, params[:name] %>

<%= label_tag :category_id %>
<%= select_tag(:category_id, options_for_select(Category.all.collect {|o| [ o.name, o.id ] }, params[:category_id]), { prompt: 'Select Category'}) %>

<%= submit_tag"Search" %>
<% end %>

<%= pluralize(@projects.count,"Result") %>
<% @projects.each do |project| %>
<%= project.name %>
<% end %>