我做了一些关于使用node.js处理POST请求的研究，所以现在正在运行，有点像。 我也知道如何使用mongoose将新的JSON对象保存到mongoDB集合。 我觉得我很接近解决方案，但我找不到答案。
现在，我需要一些帮助才能将这两者放在一起。
处理POST请求[ok + - ] =＆gt; 转换为JSON对象/猫鼬对象 [not okay] =＆gt;将其保存到收藏[ok + - ]
这是我正在使用的代码。基本功能有用：
处理已发布的字段并将其“保存”到对象
渲染字段（“字段”对象）
代码：
// controller function for adding a ressource
var post = function(req, res){
// incoming form
var form = new formidable.IncomingForm();
var fields = {};
console.dir('ceci est bien un post');
// everytime an field is parsed...
// This is the place where I should do validation and throw errors if needed
form.on('field', function (field, value) {
console.log(field);
console.log(value);
fields[field] = value;
});
// Once the form is parsed completely
form.on('end', function () {
// testing the output
var ressources = util.inspect(fields, {showHidden: false, depth: null});
console.dir(util.inspect(fields, {showHidden: false, depth: null}));
// here save it in mongodb collection
var ressource = new Ressource(fields);
// ressource.save(function (err, ressource, isSuccess) {
// if (err) {
// res.status(400);
// res.send('Error occured ' + err);
// }
// else if (isSuccess === 1) {
// res.status(201);
// res.send(ressource);
// }
// else {
// res.status(400);
// }
// });
// rendering the page with the results
res.render('addRessourceView', {
title: 'Ressources',
fields: ressources
});
});
form.parse(req);
};
这是猫鼬模型：
var mongoose = require('mongoose'),
Schema = mongoose.Schema;
var ressourceModel = new Schema({
title: { type: String },
descr_short: { type: String },
m_visual: { type: Boolean, default: false },
m_writing:{ type: Boolean, default: false },
m_moving: { type: Boolean, default: false },
m_speaking:{ type: Boolean, default: false },
m_music:{ type: Boolean, default: false },
age: String,
minAge: { type: Number },
maxAge: { type: Number },
prerequisite:{ type: Array,
items: { type: String },
uniqueItems: true},
language: { type: String },
source: { type: String },
intra_identify: { type: Boolean, default: false },
intra_expression: { type: Boolean, default: false },
intra_comprehension: { type: Boolean, default: false },
intra_regulation: { type: Boolean, default: false },
intra_utilisation: { type: Boolean, default: false },
theme_impulsivity: { type: Boolean, default: false },
theme_violence: { type: Boolean, default: false },
inter_identify: { type: Boolean, default: false },
inter_expression: { type: Boolean, default: false },
inter_comprehension: { type: Boolean, default: false },
inter_regulation: { type: Boolean, default: false },
inter_utilisation: { type: Boolean, default: false },
details:{
type: Object,
properties: {
goals: { type: Array,
items: { type: String },
uniqueItems: true},
preparation: String,
exercices: { type: Array,
items: { type: Object }},
reflexion: String
}
},
upload:{ type: Array,
items: { type: Object }}
});
module.exports = mongoose.model('Ressource', ressourceModel);
注意：evrything是“boolean”是一个复选框输入
因此所有这些字段也都在表单中（我刚刚没有实现文件上传）。 基本上我需要帮助的是：
我真的在这里学习，我只是一个初学者，我试着用我的问题尽可能清楚，我希望你们能够帮助我！
谢谢， Xogno
答案 0 :(得分：0)
昨天，我花了一整天的时间来研究它，然后我按照自己的意愿来实现它！实际上，在进行了一些研究之后，这并不是很困难：它只需要一些好的逻辑并花时间去做。
免责声明 ：我正在使用'formidable'软件包来处理帖子请求，并使用this tutorial了解它。
我首先开始添加带注释的结构，只是为了记下我的代码背后的逻辑思维。然后我开始逐个实现每个字段的代码。每次解析一个字段时都会执行form.on('field'....){}，这样我就可以逐个处理它们。为此，我使用了switch(true)倍数cases ... : ... break;。
我添加了所需的验证，向对象添加了一个错误，这样所有字段都被逐个添加到JSON对象中。
关于错误，我在html页面中使用EJS模板显示它们。
然后，一旦一切正常（处理POST字段和处理错误），我唯一要做的就是使用mongoose中的.save方法将其链接（保存）到mongodb集合。
所以这在服务器端发生，并且不会动态发生。也许以后我会用ajax或其他一些框架（Vue.js？）将它重新编码为动态工作，所以它不需要重新加载整个页面并且效率更高。
这是代码，以防它可能有所帮助！
form.on('field', function (field, value) {
console.log(field);
console.log(value);
switch (true) {
//check if title is not empty, if empty, throw error
case field === 'title':
if(value == ''){
// then error
console.log('titre vide')
fields.error = ['title-empty'];
fields[field] = value;
}
else{
fields.error = [];
fields[field] = value;
}
break;
// check if description is not empty
case field === 'short_descr':
if(value == ''){
// then error
console.log('titre vide')
fields.error = ['descr-empty'];
fields[field] = value;
}
else{
fields[field] = value;
}
break;
// when receiving minAge or maxAge, save it as number
case (field === 'minAge' || field === 'maxAge') :
if(field === 'maxAge'){
var maxAge = value;
if(Number(maxAge) < Number(fields.minAge)){
// then error
console.log('Error : maxAge plus petit que minAge')
fields.error.push('maxAge<minAge');
}
}
fields[field] = Number(value);
break;
// if 'objectives'
case field === 'objectives':
console.log('hey we have an objectif!')
// when receiving an objective, verify if there's already one
if('objectives' in fields.details){
//then there is already an objective object
console.log('adding an objective to the list');
fields.details[field].push(value);
}
// then we create the objective entry in fields.details
else {
fields.details[field] = [value];
console.log('ajouté aux détails');
}
break;
// if 'materials'
case field === 'materials':
console.log('hey we have an material!')
// when receiving an objective, verify if there's already one
if('materials' in fields.details){
//then there is already an objective object
console.log('adding an material to the list');
fields.details[field].push(value);
}
// then we create the objective entry in fields.details
else {
fields.details[field] = [value];
console.log('ajouté aux détails');
}
break;
// when receiving an exercice, verify if there's already an exercice that exists
// if there's already an exercice that exists, and this one isn't null, add this one as another exercice
// verify also if ex_time is a number
// and insert it under 'details.exercices' (array of objects : {ex_descr: '', ex_time:''})
// renvoyer une erreur si le temps est vide ou si pas un nombre
case field === 'exercices':
console.log('hey we have an exercice!')
// when receiving an objective, verify if there's already one
//first check if it's not empty
if('exercices' in fields.details){
if(value === ''){
//it's empty, add an error
fields.error.push('Empty-' + field + '[' + j + ']');
console.log('exercice is empty');
}
//then there is already an objective object
console.log('adding an exercice to the list');
var object_exercices = {};
object_exercices.ex = value;
fields.details.exercices.push(object_exercices);
j++;
}
// then we create the objective entry in fields.details
else {
if(value === ''){
//it's empty, add an error
fields.error.push('Empty-' + field + '[' + j + ']');
console.log('exercice is empty');
}
var object_exercices = {};
object_exercices.ex = value;
fields.details.exercices = [object_exercices];
console.log('ajouté aux détails');
j++;
}
break;
//if it's an exercice_time we need to add it to the exercice object in the exercice array
case field === 'exercices-time':
console.log('hey we have an exercice-time!')
// when receiving an exercice-time, verify if there's already an exercice existing
if ('exercices' in fields.details){
if(isNaN(value) || value === ''){
// if it's not a number, push a new error
fields.error.push('NaNexercice_time[' + i + ']');
console.log('but its not a number or is empty ' + i);
//recuparate the object of the exercice
var object_exercices = {};
object_exercices = fields.details.exercices[i];
object_exercices.exercice_time = value;
// add the value of ex_time to it
fields.details.exercices[i] = object_exercices;
i++;
} else {
// if it's a number
// and then there is already an exercice object
console.log('adding an exercice-time to the last exercice ' + i);
//recuparate the object of the exercice
var object_exercices = {};
object_exercices = fields.details.exercices[i];
object_exercices.exercice_time = Number(value);
// add the value of ex_time to it
fields.details.exercices[i] = object_exercices;
i++;
}
}
break;
// if "preparation" add it to details.preparation
case field === 'preparation':
fields.details[field] = value;
console.log('ajouté aux détails');
break;
case field === 'intra_identification' || field === 'intra_regulation' || field === 'intra_understanding'
|| field === 'intra_utilisation' || field === 'intra_expression' || field === 'inter_identification'
|| field === 'inter_expression' || field === 'inter_utilisation' || field === 'inter_regulation'
|| field === 'inter_understanding':
//to see if they've at least checked one competence
fields[field] = value;
break;
// otherwise it's a basic input
default:
fields[field] = value;
}
});
// Once the form is parsed completely
form.on('end', function () {
// last error handling
//test if they've at least added one competence
if(!fields.intra_identification && !fields.intra_regulation
&& !fields.intra_understanding && !fields.intra_utilisation
&& !fields.intra_expression && !fields.inter_identification
&& !fields.inter_expression && !fields.inter_utilisation
&& !fields.inter_regulation && !fields.inter_understanding) {
fields.error.push('No competence selected');
console.log('No competence selected');
}
// testing the output
console.dir(util.inspect(fields, {showHidden: false, depth: null}));
//time to save
// see if there were errors
if(fields.error.length < 1){
//no errors
//then save it in the database
console.log('no errors');
// save it in mongodb collection
var ressource = new Ressource(fields);
ressource.save(function (err, ressource, isSuccess) {
if (err) {
res.status(400);
//res.send('Error occured ' + err);
res.render('addRessourceView', {
title: 'Ressources',
fields: fields,
saved: false
});
}
else if (isSuccess === 1) {
res.status(201);
//res.send(ressource);
// render the page with save success
res.render('addRessourceView', {
title: 'Ressources',
fields: fields,
saved: true
});
}
else {
res.status(400);
res.render('addRessourceView', {
title: 'Ressources',
fields: fields,
saved: false
});
}
});
} else {
console.dir(fields.error);
// render the page with save success
res.render('addRessourceView', {
title: 'Ressources',
fields: fields,
saved: false
});
}
});
form.parse(req);