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package tests
import (
"fmt"
r "gopkg.in/rethinkdb/rethinkdb-go.v6"
)
// Return heroes and superheroes.
func ExampleBranch() {
cur, err := r.DB("examples").Table("marvel").OrderBy("name").Map(r.Branch(
r.Row.Field("victories").Gt(100),
r.Row.Field("name").Add(" is a superhero"),
r.Row.Field("name").Add(" is a hero"),
)).Run(session)
if err != nil {
fmt.Print(err)
return
}
var strs []string
err = cur.All(&strs)
if err != nil {
fmt.Print(err)
return
}
for _, str := range strs {
fmt.Println(str)
}
// Output:
// Iron Man is a superhero
// Jubilee is a hero
}
// Return an error
func ExampleError() {
err := r.Error("this is a runtime error").Exec(session)
fmt.Println(err)
}
// Suppose we want to retrieve the titles and authors of the table posts. In the
// case where the author field is missing or null, we want to retrieve the
// string "Anonymous".
func ExampleTerm_Default() {
cur, err := r.DB("examples").Table("posts").Map(map[string]interface{}{
"title": r.Row.Field("title"),
"author": r.Row.Field("author").Default("Anonymous"),
}).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res map[string]interface{}
err = cur.One(&res)
if err != nil {
fmt.Print(err)
return
}
fmt.Print(res)
}
// Convert a Go integer to a ReQL object
func ExampleExpr_int() {
cur, err := r.Expr(1).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res interface{}
err = cur.One(&res)
if err != nil {
fmt.Print(err)
return
}
jsonPrint(res)
// Output: 1
}
// Convert a Go slice to a ReQL object
func ExampleExpr_slice() {
cur, err := r.Expr([]int{1, 2, 3}).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res []interface{}
err = cur.All(&res)
if err != nil {
fmt.Print(err)
return
}
jsonPrint(res)
// Output:
// [
// 1,
// 2,
// 3
// ]
}
// Convert a Go slice to a ReQL object
func ExampleExpr_map() {
cur, err := r.Expr(map[string]interface{}{
"a": 1,
"b": "b",
}).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res interface{}
err = cur.One(&res)
if err != nil {
fmt.Print(err)
return
}
jsonPrint(res)
// Output:
// {
// "a": 1,
// "b": "b"
// }
}
// Convert a Go slice to a ReQL object
func ExampleExpr_struct() {
type ExampleTypeNested struct {
N int
}
type ExampleTypeEmbed struct {
C string
}
type ExampleTypeA struct {
ExampleTypeEmbed
A int
B string
Nested ExampleTypeNested
}
cur, err := r.Expr(ExampleTypeA{
A: 1,
B: "b",
ExampleTypeEmbed: ExampleTypeEmbed{
C: "c",
},
Nested: ExampleTypeNested{
N: 2,
},
}).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res interface{}
err = cur.One(&res)
if err != nil {
fmt.Print(err)
return
}
jsonPrint(res)
// Output:
// {
// "A": 1,
// "B": "b",
// "C": "c",
// "Nested": {
// "N": 2
// }
// }
}
// Convert a Go struct (with rethinkdb tags) to a ReQL object. The tags allow
// the field names to be changed.
func ExampleExpr_structTags() {
type ExampleType struct {
A int `rethinkdb:"field_a"`
B string `rethinkdb:"field_b"`
}
cur, err := r.Expr(ExampleType{
A: 1,
B: "b",
}).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res interface{}
err = cur.One(&res)
if err != nil {
fmt.Print(err)
return
}
jsonPrint(res)
// Output:
// {
// "field_a": 1,
// "field_b": "b"
// }
}
// Execute a raw JSON query
func ExampleRawQuery() {
cur, err := r.RawQuery([]byte(`"hello world"`)).Run(session)
if err != nil {
fmt.Print(err)
return
}
var res interface{}
err = cur.One(&res)
if err != nil {
fmt.Print(err)
return
}
jsonPrint(res)
// Output: "hello world"
}
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