如何查询含有苹果的冰沙?(下面是包含3个文档的集合)
_id => 1
name => 'best smoothie'
ingredients => Array
(
[0] => apple
[1] => raspberry
[2] => orange
[3] => banana
)
_id => 2
name => 'summer smoothie'
ingredients => Array
(
[0] => lemon
[1] => mint
)
_id => 3
name => 'yogurt smoothie'
ingredients => Array
(
[0] => apple
[1] => blueberry
)
{"ingredient": {$in: ["apple","cinnamon","sugar"]}}
将测试ingredient字段是否包含3个列出的值中的一个。 - Aneil Mallavarapu