mirror of
https://github.com/krisk/Fuse.git
synced 2026-01-18 16:16:25 +00:00
56 lines
1.6 KiB
Markdown
56 lines
1.6 KiB
Markdown
# Logical Query Operators
|
|
|
|
## `$and`
|
|
|
|
```js
|
|
{ $and: [ { <expression_1> }, { <expression_2> } , ... , { <expression_N> } ] }
|
|
```
|
|
|
|
The `$and` operator performs a logical **AND** operation on an array of expressions and selects the entries that satisfy all the expressions. The `$and` operator uses short-circuit evaluation (i.e, if the first expression evaluates to false, Fuse.js will not evaluate the remaining expressions).
|
|
|
|
::: tip
|
|
Fuse.js provides an implicit **AND** operation when specifying a comma separated list of expressions. Using an explicit **AND** with the `$and` operator is necessary when the same field or operator has to be specified in multiple expressions.
|
|
:::
|
|
|
|
#### Examples
|
|
|
|
```js
|
|
const result = fuse.search({
|
|
$and: [{ author: 'abc' }, { title: 'xyz' }]
|
|
})
|
|
```
|
|
|
|
## `$or`
|
|
|
|
The `$or` operator performs a logical **OR** operation on an array expressions and selects the entries that satisfy at least one of the expressions.
|
|
The `$or` operator uses short-circuit evaluation (i.e, if the first expression evaluates to true, Fuse.js will not evaluate the remaining expressions).
|
|
|
|
#### Examples
|
|
|
|
```js
|
|
const result = fuse.search({
|
|
$or: [{ author: 'abc' }, { author: 'def' }]
|
|
})
|
|
```
|
|
|
|
---
|
|
|
|
### Use with Extended Searching
|
|
|
|
Logical query operations pair quite nicely with [extended searching](/examples.html#extended-search).
|
|
|
|
```js
|
|
const result = fuse.search({
|
|
$and: [
|
|
{ title: 'old war' }, // Fuzzy "old war"
|
|
{ color: "'blue" }, // Exact match for blue
|
|
{
|
|
$or: [
|
|
{ title: '^lock' }, // Starts with "lock"
|
|
{ title: '!arts' } // Does not have "arts"
|
|
]
|
|
}
|
|
]
|
|
})
|
|
```
|