xlanex6/_vue-rails.md

## _vue-rails.md

      
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              _vue-rails.md
            
          
    Setup Rails and Vuejs


Generate new rails app using --webpack flag

rails new myApp --webpack=vue

Note:

You can use --webpack=angular for angular application and --webpack=react for react.
you can also pass -J flag like rails new myApp -J --webpack=vue to ignore turbolink, but strongly
recommend you don't do this, I will see how to make vue js compitable with turbolinks.


Keep all of the vue js related codes in app/javascript/pack/ directory. Anything that needs to be
compiled by webpack should go inside this directory.


app/assets/javascript is still there for your js and coffescript code that are independed of webpack modules.


vue-turbolinks npm module to fix turbolink problems


import TurbolinksAdapter from 'vue-turbolinks';

document.addEventListener('turbolinks:load', () => {
  // This code will setup headers of X-CSRF-Token that it grabs from rails generated token in meta tag.
  axios.defaults.headers.common['X-CSRF-Token'] = document.querySelector('meta[name="csrf-token"]').getAttribute('content')

  new Vue({
    ...
    mixin: [TurbolinksAdapter],
    ...
  })
})
yarn add vue-turbolink

axios npm module for making server request (alternative to vue-resource or $.ajax)

yarn add axios
Usage
axios.post('/users', {
  firstName: 'John',
  lastName: 'Doe',
})
 .then(res => console.log(res))
 .catch(err => console.log(err));
Example application below:

  
## application.html.erb
<!-- app/views/application.html.erb -->

<!DOCTYPE html>
<html>
  <head>
    <title>DemoTurbolinks</title>
    <%= csrf_meta_tags %>

    <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track': 'reload' %>
    <%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>

    <%= javascript_pack_tag 'application'  %>
  </head>

  <body>
    <%= yield %>
  </body>
</html>

## application.js
// app/javascript/packs/application.js

import Employee from './employee';

## employee.js
// app/javascript/packs/employee.js

import Vue from 'vue/dist/vue.esm';
import TurbolinksAdapter from 'vue-turbolinks';
import axios from 'axios';

export default document.addEventListener('turbolinks:load', () => {
  axios.defaults.headers.common['X-CSRF-Token'] = document
    .querySelector('meta[name="csrf-token"]')
    .getAttribute('content');
  const element = document.getElementById('employees');

  if (element !== null) {
    Vue.component('employee-row', {
      template: '#employee-row',
      mixin: [TurbolinksAdapter],
      props: {
        employee: Object,
      },
      data() {
        return {
          editMode: false,
          errors: {},
          employeeRow: this.employee,
        };
      },
      computed: {
        changeEmployeeRow: {
          get() {
            this.employeeRow;
          },
          set(data) {
            this.employeeRow = data;
          },
        },
      },
      methods: {
        // toggle the employee status which also updates
        // the  employee in the database
        toggleManagerStatus() {
          this.employee.manager = !this.employee.manager;
          this.updateEmployee();
        },

        // ajax call to update an employee
        updateEmployee() {
          axios
            .put(`/employees/${this.employee.id}.json`, {
              employee: this.employee,
            })
            .then(response => {
              // Turbolinks.visit(`/employees`);
              this.errors = {};
              this.employeeRow = response.data;
              this.editMode = false;
            })
            .catch(error => {
              this.errors = error.response && error.response.data;
            });
        },

        fireEmployee() {
          axios
            .delete(`/employees/${this.employee.id}.json`)
            .then(response => Turbolinks.visit(`/employees`))
            .catch(error => console.log(error));
        },
      },
    });

    const employees = new Vue({
      el: element,
      mixin: [TurbolinksAdapter],
      data() {
        return {
          employees: [],
          employee: {
            name: '',
            email: '',
            manager: false,
          },
          errors: {},
        };
      },
      created() {
        axios
          .get('/employees.json')
          .then(response => (this.employees = response.data))
          .catch(error => console.log(error));
      },
      methods: {
        hireEmployee() {
          axios
            .post('/employees.json', {
              employee: this.employee,
            })
            .then(response => {
              this.errors = {};
              this.employees.push(response.data);
            })
            .catch(error => {
              this.errors = error.response.data;
            });
        },
      },
    });
  }
});

## employees_controller.rb
# app/controllers/employees_controller.rb

class EmployeesController < ApplicationController
  before_action :set_employee, only: [:show, :edit, :update, :destroy]

  # GET /employees
  # GET /employees.json
  def index
    @employees = Employee.all
  end

  # GET /employees/1
  # GET /employees/1.json
  def show
  end

  # GET /employees/new
  def new
    @employee = Employee.new
  end

  # GET /employees/1/edit
  def edit
  end

  # POST /employees
  # POST /employees.json
  def create
    @employee = Employee.new(employee_params)

    respond_to do |format|
      if @employee.save
        format.html { redirect_to @employee, notice: 'Employee was successfully created.' }
        format.json { render :show, status: :created, location: @employee }
      else
        format.html { render :new }
        format.json { render json: @employee.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /employees/1
  # PATCH/PUT /employees/1.json
  def update
    respond_to do |format|
      if @employee.update(employee_params)
        format.html { redirect_to @employee, notice: 'Employee was successfully updated.' }
        format.json { render :show, status: :ok, location: @employee }
      else
        format.html { render :edit }
        format.json { render json: @employee.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /employees/1
  # DELETE /employees/1.json
  def destroy
    @employee.destroy
    respond_to do |format|
      format.html { redirect_to employees_url, notice: 'Employee was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private

  # Use callbacks to share common setup or constraints between actions.
  def set_employee
    @employee = Employee.find(params[:id])
  end

  # Never trust parameters from the scary internet, only allow the white list through.
  def employee_params
    params.require(:employee).permit(:name, :email, :manager)
  end
end

## index.html.erb
<!-- app/views/employees/index.html.erb -->

<p id="notice"><%= notice %></p>

<h1>Employees</h1>

<%= link_to 'New Employee', new_employee_path %>
<br>

<div id="employees">
  <table>
    <thead>
      <tr>
        <th>Name</th>
        <th>Email</th>
        <th>Manager?</th>
        <th colspan="3"></th>
      </tr>
    </thead>

    <tbody>
      <tr>
        <td>
          <input type="text" v-model="employee.name"/> <br/>
          <span style="color:red">{{errors.name}}</span>
        </td>

        <td>
          <input type="email" v-model="employee.email"/> <br/>
          <span style="color:red">{{errors.email}}</span>
        </td>

        <td>
          <input type="checkbox" v-model="employee.manager"/>
        </td>

        <td>
          <button @click="hireEmployee">Save</button>
        </td>
      </tr>
    </tbody>

    <tbody
        is="employee-row"
        v-for="employee in employees"
        :employee="employee">
    </tbody>
  </table>
</div>

<script type="text/x-template" id="employee-row">
  <tr>
    <td>
      <div v-if="editMode">
        <input type="text" v-model="employeeRow.name"/> <br/>
        <span style="color:red">{{errors.name}}</span>
      </div>
      <div v-else>{{ employeeRow.name }}</div>
    </td>

    <td>
      <div v-if="editMode">
          <input type="email" v-model="employeeRow.email"/> <br/>
          <span style="color:red">{{errors.email}}</span>
      </div>
      <div v-else>{{ employeeRow.email }}</div>
    </td>

    <td>
      <div v-if="editMode">
        <input type="checkbox" v-model="employeeRow.manager"/>
      </div>
      <div v-else>{{ employeeRow.manager ? '&#10004;' : '' }}</div>
    </td>

    <td>
      <button v-if="editMode" @click="updateEmployee">Save</button>
      <button v-else @click="editMode = true">Edit</button>
      <button v-if="!editMode" @click="toggleManagerStatus">
        {{ employeeRow.manager ? 'Demote' : 'Promote' }}
      </button>
      <button v-if="!editMode" @click="fireEmployee" style="color:red">Fire</button>
    </td>
  </tr>
</script>
	<!-- app/views/application.html.erb -->

	<!DOCTYPE html>
	<html>
	<head>
	<title>DemoTurbolinks</title>
	<%= csrf_meta_tags %>

	<%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
	<%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>

	<%= javascript_pack_tag 'application' %>
	</head>

	<body>
	<%= yield %>
	</body>
	</html>
	// app/javascript/packs/application.js

	import Employee from './employee';
	// app/javascript/packs/employee.js

	import Vue from 'vue/dist/vue.esm';
	import TurbolinksAdapter from 'vue-turbolinks';
	import axios from 'axios';

	export default document.addEventListener('turbolinks:load', () => {
	axios.defaults.headers.common['X-CSRF-Token'] = document
	.querySelector('meta[name="csrf-token"]')
	.getAttribute('content');
	const element = document.getElementById('employees');

	if (element !== null) {
	Vue.component('employee-row', {
	template: '#employee-row',
	mixin: [TurbolinksAdapter],
	props: {
	employee: Object,
	},
	data() {
	return {
	editMode: false,
	errors: {},
	employeeRow: this.employee,
	};
	},
	computed: {
	changeEmployeeRow: {
	get() {
	this.employeeRow;
	},
	set(data) {
	this.employeeRow = data;
	},
	},
	},
	methods: {
	// toggle the employee status which also updates
	// the employee in the database
	toggleManagerStatus() {
	this.employee.manager = !this.employee.manager;
	this.updateEmployee();
	},

	// ajax call to update an employee
	updateEmployee() {
	axios
	.put(`/employees/${this.employee.id}.json`, {
	employee: this.employee,
	})
	.then(response => {
	// Turbolinks.visit(`/employees`);
	this.errors = {};
	this.employeeRow = response.data;
	this.editMode = false;
	})
	.catch(error => {
	this.errors = error.response && error.response.data;
	});
	},

	fireEmployee() {
	axios
	.delete(`/employees/${this.employee.id}.json`)
	.then(response => Turbolinks.visit(`/employees`))
	.catch(error => console.log(error));
	},
	},
	});

	const employees = new Vue({
	el: element,
	mixin: [TurbolinksAdapter],
	data() {
	return {
	employees: [],
	employee: {
	name: '',
	email: '',
	manager: false,
	},
	errors: {},
	};
	},
	created() {
	axios
	.get('/employees.json')
	.then(response => (this.employees = response.data))
	.catch(error => console.log(error));
	},
	methods: {
	hireEmployee() {
	axios
	.post('/employees.json', {
	employee: this.employee,
	})
	.then(response => {
	this.errors = {};
	this.employees.push(response.data);
	})
	.catch(error => {
	this.errors = error.response.data;
	});
	},
	},
	});
	}
	});
	# app/controllers/employees_controller.rb

	class EmployeesController < ApplicationController
	before_action :set_employee, only: [:show, :edit, :update, :destroy]

	# GET /employees
	# GET /employees.json
	def index
	@employees = Employee.all
	end

	# GET /employees/1
	# GET /employees/1.json
	def show
	end

	# GET /employees/new
	def new
	@employee = Employee.new
	end

	# GET /employees/1/edit
	def edit
	end

	# POST /employees
	# POST /employees.json
	def create
	@employee = Employee.new(employee_params)

	respond_to do \|format\|
	if @employee.save
	format.html { redirect_to @employee, notice: 'Employee was successfully created.' }
	format.json { render :show, status: :created, location: @employee }
	else
	format.html { render :new }
	format.json { render json: @employee.errors, status: :unprocessable_entity }
	end
	end
	end

	# PATCH/PUT /employees/1
	# PATCH/PUT /employees/1.json
	def update
	respond_to do \|format\|
	if @employee.update(employee_params)
	format.html { redirect_to @employee, notice: 'Employee was successfully updated.' }
	format.json { render :show, status: :ok, location: @employee }
	else
	format.html { render :edit }
	format.json { render json: @employee.errors, status: :unprocessable_entity }
	end
	end
	end

	# DELETE /employees/1
	# DELETE /employees/1.json
	def destroy
	@employee.destroy
	respond_to do \|format\|
	format.html { redirect_to employees_url, notice: 'Employee was successfully destroyed.' }
	format.json { head :no_content }
	end
	end

	private

	# Use callbacks to share common setup or constraints between actions.
	def set_employee
	@employee = Employee.find(params[:id])
	end

	# Never trust parameters from the scary internet, only allow the white list through.
	def employee_params
	params.require(:employee).permit(:name, :email, :manager)
	end
	end
	<!-- app/views/employees/index.html.erb -->

	<p id="notice"><%= notice %></p>

	<h1>Employees</h1>

	<%= link_to 'New Employee', new_employee_path %>
	<br>

	<div id="employees">
	<table>
	<thead>
	<tr>
	<th>Name</th>
	<th>Email</th>
	<th>Manager?</th>
	<th colspan="3"></th>
	</tr>
	</thead>

	<tbody>
	<tr>
	<td>
	<input type="text" v-model="employee.name"/> <br/>
	<span style="color:red">{{errors.name}}</span>
	</td>

	<td>
	<input type="email" v-model="employee.email"/> <br/>
	<span style="color:red">{{errors.email}}</span>
	</td>

	<td>
	<input type="checkbox" v-model="employee.manager"/>
	</td>

	<td>
	<button @click="hireEmployee">Save</button>
	</td>
	</tr>
	</tbody>

	<tbody
	is="employee-row"
	v-for="employee in employees"
	:employee="employee">
	</tbody>
	</table>
	</div>

	<script type="text/x-template" id="employee-row">
	<tr>
	<td>
	<div v-if="editMode">
	<input type="text" v-model="employeeRow.name"/> <br/>
	<span style="color:red">{{errors.name}}</span>
	</div>
	<div v-else>{{ employeeRow.name }}</div>
	</td>

	<td>
	<div v-if="editMode">
	<input type="email" v-model="employeeRow.email"/> <br/>
	<span style="color:red">{{errors.email}}</span>
	</div>
	<div v-else>{{ employeeRow.email }}</div>
	</td>

	<td>
	<div v-if="editMode">
	<input type="checkbox" v-model="employeeRow.manager"/>
	</div>
	<div v-else>{{ employeeRow.manager ? '✔' : '' }}</div>
	</td>

	<td>
	<button v-if="editMode" @click="updateEmployee">Save</button>
	<button v-else @click="editMode = true">Edit</button>
	<button v-if="!editMode" @click="toggleManagerStatus">
	{{ employeeRow.manager ? 'Demote' : 'Promote' }}
	</button>
	<button v-if="!editMode" @click="fireEmployee" style="color:red">Fire</button>
	</td>
	</tr>
	</script>