Jade 模板不获取从 express 传递的数据

Question

我知道问题的标题几乎相同，但问题不同。

我正在使用内置于最新 Keystone.js 版本中的 Jade 模板引擎 v.1.11.0。在控制器中，我使用两个 view.on('init') 回调查询数据。第一个回调只查询一条记录，总是通过。第二个有时不会。

category.js

var keystone = require('keystone');
var async = require('async');
exports = module.exports = function (req, res) {

    var view = new keystone.View(req, res);
    var locals = res.locals;

    // Init locals
    locals.section = 'category';
    locals.filters = {
        category: req.params.category
    };
    locals.data = {
        sections: [],
        category: {}
    };

    // Load current category
    view.on('init', function (next) {

        var q = keystone.list('Category').model.findOne({
            key: locals.filters.category
        });

        q.exec(function (err, result) {
            locals.data.category = result;
            locals.section = locals.data.category.name.toLowerCase(); 
            next(err);
        });
    });


    // Load sections
    view.on('init', function (next) {   
        var q = keystone.list('Section').model.find().where('category').in([locals.data.category]).sort('sortOrder').exec(function(err, results) {

            if (err || !results.length) {
                return next(err);
            }

            async.each(results, function(section, next) {
                keystone.list('Article').model.find().where('section').in([section.id]).sort('sortOrder').exec(function(err, articles){
                    var s = section;
                    if (articles.length) {
                        s.articles = articles;
                        locals.data.sections.push(s);
                    } else {
                        locals.data.sections.push(s);
                    }
                });             

            }, function(err) {
                console.log(locals.data.sections);
            });

            next(err);
        });
    });

    view.render('category');
};

在我看来，我应该总是让这个通过：

sections: { _id: 574b909b43ff68163ed86bf2, publicTitle: 'Title 1', key: 'name-1', sortOrder: 3, name: 'Name 1', __v: 0, category: 574b8960947f45f034ac89b4, text: '', image: {} }

category: { _id: 574b8960947f45f034ac89b4, key: 'blabla', sortOrder: 1, name: 'Blabla', __v: 0, image: {} }

但是 60% 的时候，我得到这个：

sections:

category: { _id: 574b8960947f45f034ac89b4, key: 'johndoe', sortOrder: 1, name: 'JohnDoe', __v: 0, image: {} }

奇怪的是，如果我转到另一个类别，它有更多个部分并且喜欢 30 篇文章，我有 90% 的时间得到部分，但仍然有 10% 的部分丢失.这在开发和生产中都存在。

有些“next()”触发得太早了吗？我看不出哪里搞砸了。

Answer 1

好的。在阅读 async 之后，我设法使用 async.parallel.

使其正常工作

var keystone = require('keystone');
var async = require('async');
exports = module.exports = function (req, res) {

    var view = new keystone.View(req, res);
    var locals = res.locals;

    // Init locals
    locals.section = 'category';
    locals.filters = {
        category: req.params.category
    };
    locals.data = {
        sections: [],
        category: {}
    };

    // Load current category
    view.on('init', function (next) {

        var q = keystone.list('Category').model.findOne({
            key: locals.filters.category
        });

        q.exec(function (err, result) {
            locals.data.category = result;
            locals.section = locals.data.category.name.toLowerCase();
            getChildrenRecords(locals.data.category, next);
        });
    });


    function getChildrenRecords(category, next){

        var q = keystone.list('Section').model.find().where('category').in([category]).sort('sortOrder').exec(function(err, results) {

            if (err || !results.length) {
                return next(err);
            }

            callItems = [];

            for(var i = 0; i < results.length; i++) {
                var data = results[i];
                callItems.push(makeCallbackFunction(data));
            }

            function makeCallbackFunction(section) {
                return function (callback) {

                    keystone.list('Article').model.find().where('section').in([section.id]).sort('sortOrder').exec(function(err, articles){

                        if (err) return callback(err);

                        if (articles.length) { section.articles = articles; }
                            locals.data.sections.push(section);
                            callback();
                    });
                };
            }

            async.parallel(callItems, function(err, results){
                next(err);
            });
        });
    }


    // Render the view
    view.render('category');
};

Jade 模板不获取从 express 传递的数据

Jade template doesn't get the data passed from express

mongoose

node.js

express

keystonejs