Query Condition - $slice

Function Build

The query package provides two functions: Slice and SliceRanger.

Use Slice to specify the number of array elements to return:

// bson.D{bson.E{Key:"comments", Value:bson.D{bson.E{Key:"$slice", Value:5}}}}
slice := query.Slice("comments", 5)

Use SliceRanger to specify the starting position and the number of elements to return:

// bson.D{bson.E{Key:"comments", Value:bson.D{bson.E{Key:"$slice", Value:[]int{10, 5}}}}}
slice := query.SliceRanger("comments", 10, 5)

Method Build (Builder)

The builder provides methods with the same names. Use them when composing $slice with other projection conditions.

Using Slice:

// bson.D{bson.E{Key:"comments", Value:bson.D{bson.E{Key:"$slice", Value:5}}}}
slice := query.NewBuilder().
    Slice("comments", 5).
    Build()

Using SliceRanger:

// bson.D{bson.E{Key:"comments", Value:bson.D{bson.E{Key:"$slice", Value:[]int{10, 5}}}}, bson.E{Key:"logs", Value:bson.D{bson.E{Key:"$slice", Value:3}}}}
slice := query.NewBuilder().
    SliceRanger("comments", 10, 5).
    Slice("logs", 3).
    Build()