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未知的顶级运算符:$eq

mongodb-shell mongodb

0

Moaaz Bhnas · 技术社区 · 4 年前

{
  name: 'The Perks of Being a Wallflower'
  genres: ['Drama', 'Romance']
  rating: 8
}, 
{
  name: 'The Edge of Seventeen'
  genres: ['Drama', 'Comedy']
  rating: 7.3
},
{
  name: 'Little Women',
  genres: ['Drama', 'Romance']
  rating: 7.8
}

Comedy 或 Romance .
我试过这个:

db.shows.find(
  {},
  { genres: { $elemMatch: { $or: [{ $eq: 'Drama' }, {$eq: 'Comedy'}] } } }
);

1 回复 | 直到 4 年前

1

2

Tushar Gupta - curioustushar 4 年前

$in

演示- https://mongoplayground.net/p/MAuWUeP9GIE

db.collection.find({
  genres: {
    $elemMatch: {
      "$in": [ "Drama", "Comedy" ]
    }
  }
})

演示- https://mongoplayground.net/p/JJJkoHuz_DZ

db.collection.find({},
{
  genres: {
    $elemMatch: {
      "$in": [ "Drama", "Comedy" ]
    }
  }
})