I have an entry in my database that looks like:

{
  "_id" : ObjectId("4e93ace3f8208ca743000004"),
  "title" : "Entry",
  "domain" : {
    "_id" : ObjectId("4e9305d5f8208cab43000001"),
    "name" : "Google"
  }
}

To query for that particular entry (or entries that use the same domain) it looks like I'm supposed to query using:

db.entries.find({domain._id : ObjectId("4e9305d5f8208cab43000001")})

This however produces an error:

SyntaxError: missing : after property id (shell):1

What am I doing wrong in my query? Secondarily, how can I branch this out to PHP?

mongodb
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