基于多元素搜索用户

Question

我正在尝试使用 first_name、last_name、email、project_name、feature_name 来实现用户记录的搜索功能。 这里 first_name、last_name 和 email 来自一个表（User），project_name 来自表 Project 和 feature_name 来自表 Feature。下面给出了模型关联。我有一个用户索引页面，其中列出了表 User 中的所有用户。需要搜索我们正在输入的用户。

模型用户.rb：

     has_many :project_users, dependent: :destroy
     has_many :projects, through: :project_users, dependent: :destroy
   end```

User have fields of first_name, last_name, email etc(using these three fields for search)

model project.rb

```class Project < ApplicationRecord
     belongs_to :user
     has_many :project_users, dependent: :destroy
     has_many :features, dependent: :destroy
     has_many :users, through: :project_users, source: :user
   end```
Project have project_name(we search using project name)

model feature.rb

```class Feature < ApplicationRecord
     belongs_to :project
   end```

Feature have feature_name(with feature_name we need to search)

**What I am look for**

We have params[:search_member] which contains the searched item(first_name, last_name, email, project_name, feature_name

For ex: params[:search_member] = "John"
        params[:search_member] = "Project1"
        params[:search_member] = "Feature1"
        params[:search_member] = "john@gmail.com"

Need a single query which checks the "params[:search_member]" in these three tables(User, Project and Feature) in fields first_name, last_name, email, project_name, and feature_name and return the users of searched value.

Working of associations

current_user.projects = will return all projects belongs to current user

project.users = return all users belongs to project

feature.project = return project that feature belongs to

and

feature.project.users will return all users of projects


```def search_all
  if params[:search_member].present?
     #need query here
  else
     User.all
  end
end```


1) If I enter project_name it will return all users of that particular project

2) If I enter first_name, last_name or email return all users of this details

3) If I enter feature name, return all users of project that the feature belongs to

Trying to do in a single joins query

Answer 1

我会试试这个

def search_all
  if params[:search_member].present?
    User.includes(projects: :features)
        .where(first_name: params[:search_member])
        .or(User.where(last_name: params[:search_member])
        .or(User.where(email: params[:search_member])
        .or(Project.where(project_name: params[:search_member]))
        .or(Feature.where(feature_name: params[:search_member]))
  else
    User.all
  end
end

如果按预期工作，那么我会将不同的子查询重构为模型中的范围，以使其更易于阅读。