获取其属性等于数组中元素之一的所有文档

Question

I have a Post model that has a publisher property defined in its schema (I'm using Mongoose). The publisher property is a string that refers to a publisher's name.

I also have an array called sourceNames that holds all the different publisher names. I want to query my database for ALL the posts whose publisher matches any one of the array elements in sourceName . My current query looks like this:

const query = postModel
      .find({ publisher: { $all: sourceNames } })
      .limit(limit)
      .skip(startIndex);

My query isn't returning anything when I exec it. Does anyone know if what I'm trying to do is possible in a single query (Rather than loop over sourceNames and make a query for each individual element?

Answer 1

Short

Just replace $all with $in

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Expl

• $all is trying to match an array with all elements in your array.

• $in instead, tries to match a string or array with one in the array.