node.js 错误 : Cannot find module 'lodash.assign'

Question

我已经在 windows 64bit 中安装了 node.js 并且在本地项目上 runnig gulp 时遇到了这个问题。

另一个注意事项:npm install 与 packages.json 配合良好

Error: Cannot find module 'lodash.assign'
        at Function.Module._resolveFilename (module.js:326:15)
        at Function.Module._load (module.js:277:25)
        at Module.require (module.js:354:17)
        at require (internal/module.js:12:17)
        at Object.<anonymous> (D:\NBCredit_FRTE\RelyToolsSln\RelyTools.Web\node_modules\gulp-jshint\node_modules\lodash.clone\node_modules\lodash._baseclone\index.js:9:14)
        at Module._compile (module.js:410:26)
        at Object.Module._extensions..js (module.js:417:10)
        at Module.load (module.js:344:32)
        at Function.Module._load (module.js:301:12)
        at Module.require (module.js:354:17)
        at require (internal/module.js:12:17)
     PS D:\NBCredit_FRTE\RelyToolsSln\RelyTools.Web>

这是我的 package.json(我正在尝试设置这个项目: https://github.com/MarlabsInc/webapi-angularjs-spa)

{
  "name": "webapi-angularjs-spa",
  "description": "SPA Demo app with AngularJS",
  "author": "Shiju Varghese",
  "version": "0.5.0",
  "repository": "https://github.com/MarlabsInc/webapi-angularjs-spa",
  "devDependencies": {
    "gulp-util": "~2.2.14",
    "gulp": "~3.9.0",
    "gulp-concat": "~2.1.7",
    "gulp-uglify": "~0.2.1",
    "jshint": "~2.4.3",
    "gulp-jshint": "~1.4.2",
    "jshint-stylish": "~0.1.5",
    "gulp-cssnano": "~2.1.0",
    "gulp-rename": "~1.1.0",
    "gulp-size": "~0.1.3",
    "gulp-rimraf": "~0.2.0",
    "gulp-open": "~0.2.8",
    "gulp-connect": "~2.0.5"
  },
  "dependencies": {
    "lodash": "^4.2.0"
  }
}

这是我的 gulp 文件:

var gulp = require('gulp'),
    gutil = require('gulp-util'),
    uglify = require('gulp-uglify'),
    jshint = require('gulp-jshint'),
    concat = require('gulp-concat'),
    jshintreporter = require('jshint-stylish'),
    minifycss = require('gulp-minify-css'),
    size = require('gulp-size'),
    clean = require('gulp-clean'),
    rename = require('gulp-rename'),
    open = require('gulp-open'),
    connect = require('gulp-connect');

var filePath = {
    appjsminify: { src: './Scripts/app/**/*.js', dest: './Scripts/app' },
    libsjsminify: { src: ['./Scripts/libs/**/*.js', '!*.min.js', '!/**/*.min.js'], dest: './Scripts/libs/' },
    jshint: { src: './Scripts/app/**/*.js' },
    minifycss: { src: ['./Content/themes/**/*.css', '!*.min.css', '!/**/*.min.css'], dest: './Content/themes/' }
};



gulp.task('app-js-minify', function () {
    gulp.src(filePath.appjsminify.src)
        .pipe(uglify())
        .pipe(concat('ngscripts.js'))
        .pipe(size())
        .pipe(gulp.dest(filePath.appjsminify.dest));
});

gulp.task('libs-js-minify', function () {
    /*Excludes already minified files.*/
    gulp.src(filePath.libsjsminify.src)
    .pipe(uglify())
    .pipe(rename({ suffix: '.min' }))
    .pipe(gulp.dest(filePath.libsjsminify.dest));
});


gulp.task('jshint', function () {
    gulp.src(filePath.jshint.src)
      .pipe(jshint())
      .pipe(jshint.reporter(jshintreporter));
});


gulp.task('minify-css', function () {
    /*Excludes already minified files.*/
    gulp.src(filePath.minifycss.src)
    .pipe(minifycss())
    .pipe(rename({ suffix: '.min' }))
    .pipe(gulp.dest(filePath.minifycss.dest));
}); 

gulp.task('clean', function () {
    gulp.src(
        [
            'Scripts/app/ngscripts.js',
            'Scripts/libs/angular-ui/select2.min.js',
            'Scripts/libs/select2/select2.min.js',
            'Scripts/libs/semantic/semantic.min.js',
            'Scripts/libs/**/*.min.js',
            'Scripts/libs/jquery-1.9.1.min.js',
            '!Scripts/libs/jquery-ui-1.10.3.min.js',
            './Content/themes/semantic/semantic.min.css',
            './Content/themes/Site.min.css',
            './Content/themes/select2/select2.min.css'
        ], { read: false })
    .pipe(clean({ force: true }));
});
gulp.task('build', ['app-js-minify', 'libs-js-minify', 'minify-css']);
gulp.task('cleanbuild', ['clean']);

gulp.task('tests', function () {
    connect.server({ 
        port:8000
    });
    var testUrl = "http://localhost:8000/SpecRunner.html";
    gulp.src("./SpecRunner.html")
      .pipe(open("", { url: testUrl }));
});

//gulp.watch('./app/**/*.js', ['js']);

Answer 1

请尝试以下操作:

npm uninstall --save-dev gulp-jshint

npm uninstall --save lodash

npm cache clean

npm install --save-dev gulp-jshint

不确定这是您的情况的问题，但有时 Node 缓存会困惑并出现类似的消息。基本上，lodash 应该作为 gulp-jshint 的依赖项安装安装该软件包时。除非您直接调用 lodash 的某些方法，否则您应该需要手动安装它。
卸载后清理 Node 缓存，应从头下载并安装包，修复任何依赖错误。
如果这有帮助，请不要忘记投票并标记答案:-)