[RUBY] [Rails] Keyword search in multiple tables


I had a hard time searching multiple tables by keyword in one form, so I will share it as a memorandum.

Parent table


Child table




<%= form_with url: search_recipes_path, local: true, method: :get do |f| %>
  <%= f.text_field :keyword, placeholder: "Enter a keyword" %>
  <%= f.submit "Search" %>
<% end %>

The entered content is stored in: keyword and is received by the controller's params [: keyword].


resources :recipes do
  collection do
    get :search

This time it is nested in the recipe table routing.


def search
  @recipes = Recipe.includes(:ingredients).references(:ingredients).search(params[:keyword])

Let the Recipe model include the ingredients table. If you use where after includes, you need references. Pass params to scope described in model by search method.


class Recipe < ApplicationRecord
  has_many :ingredients, dependent: :destroy

  scope :search, -> (keyword) {
    where('title like :q OR name like :q', q: "%#{keyword}%") if keyword.present?


params [: keyword] is passed as an argument to (keyword). If the keyword is empty, then @ recipes = Recipe.all.


<%= form_with url: search_recipes_path, local: true, method: :get do |f| %>
  <%= f.text_field :keyword, placeholder: "Enter a keyword" %>
  <%= f.submit "Search" %>
<% end %>

<h1>search results</h1>
<% @recipes.each do |r| %>
  <%= r.title %>
<% end %>

This is completed. If you want to add other columns to your keyword search, use OR to add the column name to where.

Reference site


How to search with multiple words ↓ https://qiita.com/tomaaaaaaaa/items/4c2beeb504da058408a4 https://qiita.com/Orangina1050/items/ca4e5dc26e0a32ee3137

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