Ruby on rails learning record -2020.10.06

Create a store introduction site Automatic generation of shop list

$ rails generate scaffold shop category_id:integer name:string address:string

$ rails db:migrate'```

 Association of category strike and store list model

#### **`app/model/category.rb`**

class Category < ApplicationRecord
  has_many :shops


class Shop < ApplicationRecord
  belongs_to :category

Allows you to select a category on the registration / modification form


<div class="field">
  <%= f.label :category_id %>
  <%= :category_id,{|o| [,]} %>

Display the category name in the list display and detailed display of the store list


<td><%= %></td>



Add search form to view


<%= form_tag('/shops', method: 'get') do %>
<%= label_tag(:name_key, 'Search name:') %>
<%= text_field_tag(:name_key) %>
<%= submit_tag('Search') %> <%= link_to 'Clear', shops_path %>
<% end %>


Modify index method in controller


def index
  if params[:name_key]
    @shops = Shop.where('name LIKE ?', "%#{params[:name_key]}%")
    @shops = Shop.all

Link from the welcome page


<h1>Lunch Map</h1>
<p>Tasty meal on your place!!</p>
<p><%= link_to 'Show shops', shops_path %></p>

Incorporate Google Maps API Abbreviation for Application Programming Interface An instruction or function provided to call another function from a program.

Google Maps API Google Maps API | Google Developers

API key acquisition procedure
  1. Access the Google Developers Console

Google Developers Console

  1. Select Create Project
  2. When the Google API is displayed, select "Google Maps Embed API" from the Google Maps API.
  3. Click "Enable"
  4. Click "Create Credentials" and then click the "Required Credentials" button
  5. Record the displayed API key
  • It is recommended to set "API usage restrictions" so that it can be used only from specific Web services.
  • This procedure and scope of use are subject to change on the Google side.

Add map area to view


<%= content_tag(:iframe,
                 src:'' + @shop.address,
                 width: 800,
                 height: 400,
                 frameborder: 0) %>


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