Vue.js same form for add and edit

Question

I'm a rookie on vue.js and I'm trying to extend some tutorials a completed. Been fighting with this three hours now and I'm frustrated. FYI, I'm using firebase but I'm not sure it really matters here.

So, I have a CRUD app for listing movies (I told you it was basic!). There is a form at the top of the page where you can add movies, and a table below it, where the new registries are listed. This works well.

I added Edit and Delete buttons to each row on the table. The delete function works. But the Edit function is the problem.

I'd like to use v-if on the initial form, to trigger different methods (save, edit) and show different buttons (Add, Save, Cancel).

I'm not sure how to access the objects to do this, I tried a couple of things and the v-if says the object is not defined.

thank you for reading, please ask anything you need.

import './firebase' // this has my credententials and initializeApp
import Vue from 'vue'
import App from './App'
import VueFire from 'vuefire'

Vue.use(VueFire)
Vue.config.productionTip = false

/* eslint-disable no-new */
new Vue({
  el: '#app',
  template: '<App/>',
  components: { App }
})

<template>
  <div id="app" class="container">
    <div class="page-header">
      <h1>Vue Movies</h1>
    </div>
 
    <div class="panel panel-default">
      <div class="panel-heading">
        <h3>Add Movie</h3>
      </div>
 
      <div class="panel-body">

        <div v-if="!isEditing">
          <form id="form" class="form-inline" v-on:submit.prevent="addMovie">
            <div class="form-group">
              <label for="movieTitle">Title:</label>
              <input type="text" id="movieTitle" class="form-control" v-model="newMovie.title">
            </div>
            <div class="form-group">
              <label for="movieDirector">Director:</label>
              <input type="text" id="movieDirector" class="form-control" v-model="newMovie.director">
            </div>
            <div class="form-group">
              <label for="movieUrl">URL:</label>
              <input type="text" id="movieUrl" class="form-control" v-model="newMovie.url">
            </div>
            <input type="submit" class="btn btn-primary" value="Add Movie">
          </form>
        </div>

        <div v-else>
          <form id="form" class="form-inline" v-on:submit.prevent="saveEdit(movie)">
            <div class="form-group">
              <label for="movieTitle">Title:</label>
              <input type="text" id="movieTitle" class="form-control" v-model="movie.title">
            </div>
            <div class="form-group">
              <label for="movieDirector">Director:</label>
              <input type="text" id="movieDirector" class="form-control" v-model="movie.director">
            </div>
            <div class="form-group">
              <label for="movieUrl">URL:</label>
              <input type="text" id="movieUrl" class="form-control" v-model="movie.url">
            </div>
            <input type="submit" class="btn btn-primary" value="Save">
            <button v-on:click="cancelEdit(movie['.key'])">Cancel</button>
          </form>
        </div>

      </div>

    </div>
 
    <div class="panel panel-default">
      <div class="panel-heading">
        <h3>Movies List</h3>
      </div>
      <div class="panel-body">
        <table class="table table-stripped">
          <thead>
            <tr>
              <th>Title</th>
              <th>director</th>
            </tr>
          </thead>
          <tbody>
            <tr v-for="movie in movies">

              <td>
                <a v-bind:href="movie.url" v-bind:key="movie['.key']" target="_blank">{{movie.title}}</a>
              </td>
              <td>
                {{movie.director}}
              </td>
              <td>
                <button v-on:click="editMovie(movie)">Edit</button>
              </td>
              <td>
                <button v-on:click="removeMovie(movie)">Remove</button>
              </td>

            </tr>
          </tbody>
        </table>
      </div>
    </div>
  </div>
</template>

<script>

import { moviesRef } from './firebase'

export default {
  name: 'app',
  firebase: {
    movies: moviesRef
  },
  data () {
    return {
      isEditing: false, // maybe this helps?
      newMovie: {
        title: '',
        director: '',
        url: 'http://',
        edit: false // or maybe this??
      }
    }
  },
  methods: {
    addMovie: function() {
      moviesRef.push( this.newMovie )
      this.newMovie.title = '',
      this.newMovie.director = '',
      this.newMovie.url = 'http://'
      this.newMovie.edit = false
    },
    editMovie: function (movie){
      moviesRef.child(movie['.key']).update({ edit:true }); // can't access this one with v-if, not sure why
      //this.newMovie = movie;
    },
    removeMovie: function (movie) {
      moviesRef.child(movie['.key']).remove()
    },
    cancelEdit(key){
      moviesRef.child(key).update({ edit:false })
    },
    saveEdit(movie){
      const key = movie['key'];
      moviesRef.child(key).set({
        title    : movie.title,
        director : movie.director,
        url      : movie.url,
        edit     : movie.edit
      })
    }
  }
}

</script>

<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

Answer 1

You should change the isEditing to true when the Edit button clicked, and you should define the data movie.

editMovie: function (movie){
  ...
  this.movie = Vue.util.extend({}, movie); // deep clone to prevent modify the original object
  this.isEditing = true;
},

Answer 2

As suggested in the comments (by Ben), I added the movie declaration to the initial data object. So now it looks like this:

data () {
    return {
      isEditing: false,
      newMovie: {
        title: '',
        director: '',
        url: 'http://',
        edit: false
      },
      movie: {
        edit: false
      }
    }
  },

Now v-if works just fine, like this:

<div v-if="!movie.edit">

"is Editing" was no longer necessary so I removed it.