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package gorethink
import (
"fmt"
)
// Find a document by ID.
func ExampleTerm_Get() {
// Fetch the row from the database
res, err := DB("examples").Table("heroes").Get(2).Run(session)
if err != nil {
fmt.Print(err)
return
}
defer res.Close()
if res.IsNil() {
fmt.Print("Row not found")
return
}
var hero map[string]interface{}
err = res.One(&hero)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
fmt.Print(hero["name"])
// Output: Superman
}
// Find a document by ID.
func ExampleTerm_GetAll() {
// Fetch the row from the database
res, err := DB("examples").Table("heroes").GetAll(2).Run(session)
if err != nil {
fmt.Print(err)
return
}
defer res.Close()
if res.IsNil() {
fmt.Print("Row not found")
return
}
var hero map[string]interface{}
err = res.One(&hero)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
fmt.Print(hero["name"])
// Output: Superman
}
// Find a document by ID.
func ExampleTerm_GetAll_multiple() {
// Fetch the row from the database
res, err := DB("examples").Table("heroes").GetAll(1, 2).Run(session)
if err != nil {
fmt.Print(err)
return
}
defer res.Close()
var heroes []map[string]interface{}
err = res.All(&heroes)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
fmt.Print(heroes[0]["name"])
// Output: Superman
}
// Find all document with an indexed value.
func ExampleTerm_GetAllByIndex() {
// Fetch the row from the database
res, err := DB("examples").Table("heroes").GetAllByIndex("code_name", "man_of_steel").Run(session)
if err != nil {
fmt.Print(err)
return
}
defer res.Close()
if res.IsNil() {
fmt.Print("Row not found")
return
}
var hero map[string]interface{}
err = res.One(&hero)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
fmt.Print(hero["name"])
// Output: Superman
}
// Find a document and merge another document with it.
func ExampleTerm_Get_merge() {
// Fetch the row from the database
res, err := DB("examples").Table("heroes").Get(4).Merge(map[string]interface{}{
"powers": []string{"speed"},
}).Run(session)
if err != nil {
fmt.Print(err)
return
}
defer res.Close()
if res.IsNil() {
fmt.Print("Row not found")
return
}
var hero map[string]interface{}
err = res.One(&hero)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
fmt.Printf("%s: %v", hero["name"], hero["powers"])
// Output: The Flash: [speed]
}
// Get all users who are 30 years old.
func ExampleTerm_Filter() {
// Fetch the row from the database
res, err := DB("examples").Table("users").Filter(map[string]interface{}{
"age": 30,
}).Run(session)
if err != nil {
fmt.Print(err)
return
}
defer res.Close()
// Scan query result into the person variable
var users []interface{}
err = res.All(&users)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
fmt.Printf("%d users", len(users))
// Output: 2 users
}
// Get all users who are more than 25 years old.
func ExampleTerm_Filter_row() {
// Fetch the row from the database
res, err := DB("examples").Table("users").Filter(Row.Field("age").Gt(25)).Run(session)
if err != nil {
fmt.Print(err)
return
}
defer res.Close()
// Scan query result into the person variable
var users []interface{}
err = res.All(&users)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
fmt.Printf("%d users", len(users))
// Output: 3 users
}
// Retrieve all users who have a gmail account (whose field email ends with @gmail.com).
func ExampleTerm_Filter_function() {
// Fetch the row from the database
res, err := DB("examples").Table("users").Filter(func(user Term) Term {
return user.Field("email").Match("@gmail.com$")
}).Run(session)
if err != nil {
fmt.Print(err)
return
}
defer res.Close()
// Scan query result into the person variable
var users []interface{}
err = res.All(&users)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
fmt.Printf("%d users", len(users))
// Output: 1 users
}
|
