[英]How to update document on pre or post query hook in mongoose?
I am trying to update a field on a query hook. 我正在尝试更新查询挂钩上的字段。 For example:
例如:
var mySchema = new Schema({
name: String,
queryCount: {type: Number, default:0}
});
I want to increment and update queryCount
field on each find
or findOne
query. 我想在每个
find
或findOne
查询上增加和更新queryCount
字段。
mySchema.post('find', function (doc) {
// here is the magic
});
I have tried a few things but no success so far. 到目前为止,我尝试了一些但没有成功的事情。 Can I achieve this in model or do I have to do it in the controller?
我可以在模型中实现这一点,还是必须在控制器中完成?
What you want is a post init
hook 你想要的是一个post
init
钩子
mySchema.post('init', function (doc) {
doc.queryCount++;
doc.save();
});
Alternatively, you could use a mongoose static method which internally calls findAndUpdate()
或者,您可以使用
findAndUpdate()
静态方法,该方法在内部调用findAndUpdate()
mySchema.statics.findWithIncrement = function (query, callback) {
this.findAndUpdate(query, { $inc: { queryCount: 1 })
.exec(function(err, res) {
if (err) return callback(err);
//Handle response
});
}
And then use the method in your controllers: 然后在控制器中使用该方法:
MyModel.findWithIncrement({name: "someName"}, function (err, result) {
})
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