模式方法不适用于mongodb中的find方法

Question

I created a schema.methods.toAuthJSON which will return filtered data. while i use findOne() it works just fine. but When I use just find() it doesn't work. how should i get it right?

Member.findOne().exec((err, member) => {

res.json(member.toAuthJSON())
})

Answer 1

The question definitely needs more detail but IF we assume as stated that the shown findOne code works but the not shown find code does not, then it is probably due to the return value not being used correctly for the find code.

Assumption for missing find code:

Member.find().exec((err, member) => {
  res.json(member.toAuthJSON())
});

Again, if this assumption is correct then it is a misunderstanding of the returned value from find . While findOne will return a single document, find returns an array of documents. So the assumed code would need to be updated to iterate over the returned array invoking the custom method for each document.

One approach would be to use a map:

Member.find().exec((err, members) => {
  res.json(members.map((member) => member.toAuthJSON()));
});

This approach will map over the returned array of documents returning a new array of outputs from the custom method.