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10
Databases/MongoDB/Querying_a_collection_with_Mongoose.md
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@ -117,8 +117,16 @@ The following comparison operators are available in MongoDB:
| `in` | In | | `in` | In |
| `nin` | Not in | | `nin` | Not in |
We can employ these comparators within a `.find` filter. For example let's imagine that our `courses` instances have a property of `price`. To filter prices $>= 10 \And \And <= 20$: We can employ these comparators within a `.find` filter. For example let's imagine that our `courses` instances have a property of `price`.
To filter course prices that are greater than or equal to 10 and less than or equal to 29:
```js ```js
Course.find(({price: {$gte: 10, $lte: 20} })) Course.find(({price: {$gte: 10, $lte: 20} }))
``` ```
To filter course prices that are either 10, 15 or 20:
```js
Course.find(({price: {$in: [10, 15, 20] } }))
```