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|
package tests
import (
"fmt"
r "gopkg.in/rethinkdb/rethinkdb-go.v6"
)
// Group games by player.
func ExampleTerm_Group() {
cur, err := r.DB("examples").Table("games").Group("player").Run(session)
if err != nil {
fmt.Print(err)
return
}
var res []interface{}
err = cur.All(&res)
if err != nil {
fmt.Print(err)
return
}
fmt.Print(res)
}
// Group games by the index type.
func ExampleTerm_GroupByIndex() {
cur, err := r.DB("examples").Table("games").GroupByIndex("type").Run(session)
if err != nil {
fmt.Print(err)
return
}
var res []interface{}
err = cur.All(&res)
if err != nil {
fmt.Print(err)
return
}
fmt.Print(res)
}
// Suppose that the table games2 has the following data:
//
// [
// { id: 1, matches: {'a': [1, 2, 3], 'b': [4, 5, 6]} },
// { id: 2, matches: {'b': [100], 'c': [7, 8, 9]} },
// { id: 3, matches: {'a': [10, 20], 'c': [70, 80]} }
// ]
// Using MultiGroup we can group data by match A, B or C.
func ExampleTerm_MultiGroup() {
cur, err := r.DB("examples").Table("games2").MultiGroup(r.Row.Field("matches").Keys()).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res []interface{}
err = cur.All(&res)
if err != nil {
fmt.Print(err)
return
}
fmt.Print(res)
}
// Ungrouping grouped data.
func ExampleTerm_Ungroup() {
cur, err := r.DB("examples").Table("games").
Group("player").
Max("points").Field("points").
Ungroup().
Run(session)
if err != nil {
fmt.Print(err)
return
}
var res []interface{}
err = cur.All(&res)
if err != nil {
fmt.Print(err)
return
}
fmt.Print(res)
}
// Return the number of documents in the table posts.
func ExampleTerm_Reduce() {
cur, err := r.DB("examples").Table("posts").
Map(func(doc r.Term) interface{} {
return 1
}).
Reduce(func(left, right r.Term) interface{} {
return left.Add(right)
}).
Run(session)
if err != nil {
fmt.Print(err)
return
}
var res int
err = cur.One(&res)
if err != nil {
fmt.Print(err)
return
}
fmt.Print(res)
}
// Concatenate words from a list.
func ExampleTerm_Fold() {
cur, err := r.Expr([]string{"a", "b", "c"}).Fold("", func(acc, word r.Term) r.Term {
return acc.Add(r.Branch(acc.Eq(""), "", ", ")).Add(word)
}).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res string
err = cur.One(&res)
if err != nil {
fmt.Print(err)
return
}
fmt.Print(res)
// Output:
// a, b, c
}
|
