Inquirer.js:允许用户编写列表响应

Question

好吧，我被困在创造一个尤曼发电机了。我有一个提示符，它显示了三个不同选项的列表。看起来是这样的：

JS档案名称：-一-二-其他

我希望第三个选项允许用户编写自己的。我可以调用另一个提示方法吗？

​

// ****************************************************************************
// Author: Daniel Jenkins
// Date: 03/35/3015
// Purpose: A generator for creating js files including, name, date, and purpose fields.
// ****************************************************************************

var generators = require('yeoman-generator');

module.exports = generators.Base.extend({
  prompting: function() {
    var done = this.async();
    var myChoices = [this.appname, 'one', 'two', 'other'];
    var prompts = {
      type: 'list',
      name: 'fileName',
      message: 'Name of new JS file: ',
      choices: myChoices
    };

    // Select the filename from list.
    this.prompt(prompts, function(answers) {

      // Store user input as an argument for the EJS preprossor.
      this.context = {
        fileName: answers.fileName,
      };

      done();
    }.bind(this));
  },

  // Add file after filling in EJS template 
  copyMainFiles: function() {

    // Create a time object for todays date.
    var my_date = new Date();

    // Add date property. 
    this.context.fileDate = my_date.toDateString();

    // Run through EJS and create the file.
    this.template("_index.js", this.context.fileName + ".js", this.context);
  }
});

​

Answer 1

您可以通过运行条件语句来使用when，以指定在何时调用另一个字段。如果语句返回true，则该字段将被调用，否则它将被跳过。

参见添加到代码中的内容：

module.exports = generators.Base.extend( {
    prompting : function () {
        var done = this.async();
        var myChoices = [ this.appname, 'one', 'two', 'other' ];
        var prompts = [ {
            type    : 'list',
            name    : 'fileName',
            message : 'Name of new JS file: ',
            choices : myChoices
        },{
            when    : function ( answers ) {
                return answers.fileName === 'other';
            },
            type    : 'input',
            name    : 'fileName',
            message : 'custom file name'
        }];

        // Select the filename from list.
        this.prompt( prompts, function ( answers ) {

            // Store user input as an argument for the EJS preprossor.
            this.context = {
                fileName : answers.fileName,
            };

            done();
        }.bind( this ) );
    },

    // Add file after filling in EJS template 
    copyMainFiles : function () {

        // Create a time object for todays date.
        var my_date = new Date();

        // Add date property. 
        this.context.fileDate = my_date.toDateString();

        // Run through EJS and create the file.
        this.template( "_index.js", this.context.fileName + ".js", this.context );
    }
} );