0

我是 Rails 6 和 webpacker 的新手。我用 rails 和 webpacker 创建了一个新应用程序,一切正常,但是当我尝试使用 select2 时遇到了一个问题,我得到了 readyException.js:6 Uncaught TypeError: $(...).select2 is not a function错误并且无法将所选属性提交到数据库。我已经审查并尝试了网络上提出的几个建议,但没有奏效。不知道我哪里出错了。任何帮助深表感谢。顺便说一句,我使用的是 simple_form 和 Slim。

应用程序/资产/application.scss

@import 'bootstrap/scss/bootstrap';

应用程序/javascript/样式表/application.scss

@import 'bootstrap/scss/bootstrap';

应用程序/javascript/packs/application.js

import Rails from "@rails/ujs"
import Turbolinks from "turbolinks"
import * as ActiveStorage from "@rails/activestorage"
import "channels"

import "jquery";
import "popper.js";
import "bootstrap";
import "../stylesheets/application"
import "@fortawesome/fontawesome-free/js/all"
import select2 from 'select2';
import 'select2/dist/css/select2.css';


require("@rails/activestorage").start()
require("channels")
require("jquery")



Rails.start()
Turbolinks.start()
ActiveStorage.start()


$(document).ready(function() {
  $('.select').select2();
});

配置/webpack/environment.js

const { environment } = require('@rails/webpacker')

const webpack = require('webpack')
environment.plugins.prepend('Provide',
  new webpack.ProvidePlugin({
    $: 'jquery/src/jquery',
    jQuery: 'jquery/src/jquery'
  })
)

module.exports = environment

视图表单views/users/_form.html.slim

    = simple_form_for [:admin, @user] do |f|
      = f.error_notification
      = f.error_notification message: f.object.errors[:base].to_sentence if f.object.errors[:base].present?


      .form-inputs.form-group.center-block style="width:240px"
        = f.input_field :first_name,
        placeholder: 'First Name',
        class: 'form-control',
        autofocus: true,
        required: true
      .form-inputs.form-group.center-block style="width:240px"
        = f.input_field :last_name,
        placeholder: 'Last Name',
        class: 'form-control',
        autofocus: true,
        required: true
      .form-inputs.form-group.center-block style="width:240px"
        = f.input_field :email,
        placeholder: 'Email',
        class: 'form-control',
        autofocus: true,
        required: true
      .form-inputs.form-group.center-block style="width:240px"
        = f.select :roles, Role.all.map { |role| role.name }, {include_blank: true, required: true,
        include_hidden: false}, class: 'form-control', input_html: {class: 'select'}


      .form-actions.form-group.center-block style="width:240px"
        button.btn.btn-primary.space-above type="submit" Save
        = link_to "Cancel", admin_users_path, class: 'btn btn-default space-left'
4

1 回答 1

1

我认为您可能会通过两次导入 jquery 来引起问题。

删除这些行:

require("@rails/activestorage").start()
require("channels")
require("jquery")

这些是在上面的行中重复导入,(我认为)第二个require("jquery")可能会破坏 select2 插件。

此外,您没有使用select2导入中的局部变量。这应该足够了:

import $ from 'jquery'
import 'select2'

$(document).ready(function() {
  $(...).select2()
})

我在演示仓库中有一个分支,其中有一个工作示例https://github.com/rossta/rails6-webpacker-demo/compare/example/select2

于 2021-03-26T21:59:16.053 回答