查询数组大小大于1的文档
{
"_id" : ObjectId("4e8ae86d08101908e1000001"),
"name" : ["Name"],
"zipcode" : ["2223"]}{
"_id" : ObjectId("4e8ae86d08101908e1000002"),
"name" : ["Another ", "Name"],
"zipcode" : ["2224"]}db.accommodations.find({ name : { $size : 2 }})name$gtname
db.accommodations.find({ name : { $size: { $gt : 1 } }})name
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