I'm trying to pull multiple hashes from an array but only know the value of one of the hash keys. I expected $pullAll to work in a similar manner to $pull but got an error message instead.

use temp
db.dropDatabase()

db.bands.save({
name: 'The Beatles',
members: [

{name: 'John', instrument: 'guitar'}

,

{name: 'Paul', instrument: 'bass'}

,

{name: 'George', instrument: 'guitar'}

,

{name: 'Ringo', instrument: 'drums'}

]
})

db.bands.update({}, {$pull: {members:

{instrument: 'drums'}

}})
// Ringo is removed

db.bands.update({}, {$pullAll: {members:

{instrument: ['guitar', 'bass']}

}})
// John, Paul, and George should be removed but get this error instead:
// Modifier $pushAll/pullAll allowed for arrays only

db.bands.update({}, {
$pullAll: {members: [

{name: 'John', instrument: 'guitar'}

,

{name: 'Paul', instrument: 'bass'}

,

{name: 'George', instrument: 'guitar'}

]}
})
// It works if you specify the EXACT hash

db.bands.find()