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Home Page: https://gorm.io
License: MIT License
The fantastic ORM library for Golang, aims to be developer friendly
Home Page: https://gorm.io
License: MIT License
Hello, can you include a LICENSE file to describe what license you are sharing your code under?
I may be missing something, but the docs aren't really clear on this. They mention the Rows()
function can be used to iterate over table but since this returns *sql.Row
, I'm not sure how to scan this into the struct for this row. The great thing about gorm is that it handles parsing the sql data into a struct, but this seems to be missing for iteration.
The example shows this, which really isn't great given how easy all of the other functions are to use.
rows.Scan(&name, &age, &email)
I need to be able to map unconventional foreign keys
The docs give this example:
type Email struct {
Id int64
UserId int64 // Foreign key for User
Email string `sql:"type:varchar(100);"` // Set this field's type
Subscribed bool
}
What happens if UserId becomes something like CreatedByUserId but the primary key of User remains Id? How do I map the two together?
The code: https://gist.github.com/ainar-g/7323528
If I use &User{}
instead of User{},
or remove CreatedAt
and UpdatedAt
fields, it works as it should. But otherwise, it causes this:
panic: reflect: reflect.Value.Set using unaddressable value
goroutine 1 [running]:
reflect.flag.mustBeAssignable(0x192)
/usr/lib/go/src/pkg/reflect/value.go:268 +0x151
reflect.Value.Set(0x81d0c80, 0x1846a478, 0x192, 0x81d0c80, 0x1846dfe0, ...)
/usr/lib/go/src/pkg/reflect/value.go:1373 +0x29
github.com/jinzhu/gorm.(*Model).fields(0x184a06a0, 0x81d8788, 0x6, 0x18484480, 0x3, ...)
/home/ainar/go/src/github.com/jinzhu/gorm/model.go:120 +0xc2b
github.com/jinzhu/gorm.(*Do).createTable(0x184740b0, 0x81c4a20)
/home/ainar/go/src/github.com/jinzhu/gorm/do.go:689 +0x64
github.com/jinzhu/gorm.(*Chain).CreateTable(0x1846e140, 0x81c4a20, 0x1846a460, 0x1846e000)
/home/ainar/go/src/github.com/jinzhu/gorm/chain.go:237 +0x45
github.com/jinzhu/gorm.(*DB).CreateTable(0x1846d150, 0x81c4a20, 0x1846a460, 0x0)
/home/ainar/go/src/github.com/jinzhu/gorm/main.go:106 +0x7c
main.main()
/home/ainar/playground/go/db.go:36 +0x1a1
goroutine 2 [syscall]:
exit status 2
I understand that gorm choose convention over configuration. I really like that. But sometimes the column name are something that is given and could not be changed. For instance I'm currently dealing with legacy app. The old app is still running, but we needed to add more functionality on top of that.
It would be very useful to follow the convention by default, but user can still set the column name for a field. Maybe using tags on the filed ?
Hi!
if type name written using Camel we have following:
==== following does not work
var
u []UserType
...
DB.Find(&u)
==== following works fine
var
u []Usertype
...
DB.Find(&u)
type Address struct {
Id int64
Address1 string sql:"not null;unique"
Address2 string sql:"type:varchar(100);unique"
Post sql.NullString sql:not null
}
db.LogMode(true)
db.CreateTable(Address{})
在mysql下执行后没有建表成功,程序也不报错
删除掉Address1的注解 sql:"not null;unique"
后可以建表成功,但是程序不打印sql日志
I'm using MySQL 5.6.10, and the DATETIME fields are throwing this error when following the same format from your example:
type User struct {
Id int64
CreatedAt time.Time
}
The error thrown is:
sql: Scan error on column index 2: unsupported driver -> Scan pair: []uint8 -> *time.Time
This is complaining that the field is actually a string. Using string
as the type sends the string equivalent of the datetime
2013-07-25 22:48:23
I can workaround this by just casting it to a time.Time
myself but you may want to fix this issue. The driver I'm using the is typical one https://github.com/go-sql-driver/mysql.
I've made sure the field is indeed of type DATETIME
in my database.
Let me know if you need any other information.
I need to use diffrent date-time format for database and application. I have following struc for model
type SomeTable struct {
Id int64
SomeString string sql:"size:255"
SomeDate time.Time
}
I'm converting the the date format before saving by
func (o *SomeTable ) BeforeSave() (err error) {
o.SomeDate = o.SomeDate.Format(SQL_DATE_FORMAT)
return
}
but the problem is when I'm facing in when fetching data from data base. I am looking for an AfterGet method to transform the data (similar to PostGet in gorp). Can you suggest any other workaround?
It seems that eager loading is not supported?
eg. If a User has many Emails:
// Get the first record
db.First(&user)
//// SELECT * FROM users ORDER BY id LIMIT 1;
This does not get their emails.
How do I populate the entire struct?
The docs show that to then get the emails the following is needed:
// Find user's emails with guessed foreign key
db.Model(&user).Related(&emails)
//// SELECT * FROM emails WHERE user_id = 111;
So if I wanted to get a User and all their Emails, would I need to do something like the following?
db.First(&user)
db.Model(&user).Related(&user.Emails)
// Repeat for Addresses and all other relations
Hi !
var
count int64
err := db.Model(User{}).Where("mobile = ?", mobile).Count(&count).Error
fmt.Printf("Error: %v\n", err)
prints:
SQL is not valid, count(*)
and count has right value. I passed go test and results are the same. PostgreSQL 8.4.2, compiled by Visual C++ build 1400, 32-bit
This is a PostgreSQL db.
For this structure:
type User struct {
Id int64
Name string
}
this code:
db.Model(User{}).RemoveIndex("name")
does not seem to remove the index.
我一直想Go里面ORM如何能够自定义table_name(提供灵活性与旧系统对接), struct本身似乎无法保存这些信息.
gorp的做法是
t1 := dbmap.AddTableWithName(Invoice{}, "invoice_test").SetKeys(true, "Id")
t2 := dbmap.AddTableWithName(Person{}, "person_test").SetKeys(true, "Id")
t3 := dbmap.AddTableWithName(Product{}, "product_test").SetKeys(true, "Id")
urgly, beedb的做法好像是
orm.SetTable("userinfo").SetPK("uid").Where(2).Update(t)
urgly too. 你有没有好主意?
按照rails风格的类名与表名的转化在实际工作中不够灵活, 特别是国内各种拼音加单词混合的节奏....
Example
type UserSetting {
Id int64
UserId int64
...
..
}
type User struct {
Id int64
Name string
Settings UserSetting
}
...
var
u User{Name: "Robert"}
err := db.Save(&user)
command finished with error (problem was with table user_settings) but row was stayed in table users. Database has become unconsisted.
Hi Jinzu 👍
I believe you know, sql package has not sql.NullTime type. That's why evebody create something like
type NullTime struct {
Time time.Time
Valid bool // Valid is true if Time is not NULL
}
// Scan implements the Scanner interface.
func (nt *NullTime) Scan(value interface{}) error {
if value == nil {
nt.Valid = false
return nil
}
nt.Time, nt.Valid = value.(time.Time), true
return nil
}
// Value implements the driver Valuer interface.
func (nt NullTime) Value() (driver.Value, error) {
if !nt.Valid {
return nil, nil
}
return nt.Time, nil
}
The exception raises in following case:
type User struct {
Id int64
Name string
VerifiedDate NullTime
}
...
..
db.Save(&user)
db.Save(&user) generates insert SQL into tables users and null_times
How to deal with this issue? Could you suggest something?
Thank you in advance
Regards,
Robert
type Demo struct {
Id int64
Data float64
Notes []Note
}
type Note struct {
Name string
DemoId int64
Description string
}
The following code works fine if used with
data := Demo{Data: 0.55,Notes: []Note{{Name: "asdads", Description: "asdasd"}}
db.Save(&data)
However the following:
var new Demo
data := Demo{Data: 0.55,Notes: []Note{{Name: "asdads", Description: "asdasd"}}
db.Where(Demo{Data: 0.33}).Assign(data).FirstOrCreate(&new)
produces
panic: runtime error: comparing uncomparable type []main.Note
Im a Go newbie so no clue where to start debuging, or maybe the error is somewhere with me, but even the basic example in the docs with the User and Email produces the same problem.
Go version is latest stable 1.2.
When storing a number such as longitude or latitude (35.03554004971999
), unmarshalling correctly retains precision, however the process of saving to the database loses it's precision to the 6th decimal.
To verify this, I manually inserted the value directly into Postgres and it was stored correctly. I've printed the value of the struct containing the float64 value, and again, it appears correctly.
This seems to potentially be a loss somewhere in saving to the database.
I'm trying to use a simple join table in my project, the records returned have the correct attributes, but the Ids are off-by-one.
Here is a simplified version that shows the bug. One would expect the returned emails to have Ids 1 & 2, but they are 2 & 3, the Name fields are correct though.
For some reason, the SQL logging doesn't work using .Debug() in this simple example, but it does in the real project. I've copy pasted the logged SQL into the sqlite3 console, and the correct records are returned from the query.
Find() and Related() don't seem to be using the TableName() call.
对于已经存在的数据库, 编写所有model是件费力费时的工作, 如果能够批量生成struct定义会带来极大方便, 例如
gorm dump mysql://root:123@databasename
Go毕竟是一门新语言, 从头开始构建一个生产系统的机会不多, 在旧系统周边用起来的机会比较多, 保持对外界的灵活性能增加生命力.
I tried the following:
type Role string
const (
Customer Role = "CUSTOMER"
Instructor Role = "INSTRUCTOR"
Admin Role = "ADMIN"
SuperAdmin Role = "SUPERADMIN"
)
type User struct {
Id int64
Email string
Role Role //Falls over if not string
}
I kept getting the error below:
goroutine 38 [runnable]:
github.com/jinzhu/gorm.(*safeMap).Set(0xc210043ef0, 0x8598e0, 0x2, 0xc210000a08, 0x2)
/home/lee/Code/gocode/src/github.com/jinzhu/gorm/utils.go:17
created by github.com/jinzhu/gorm.toSnake
/home/lee/Code/gocode/src/github.com/jinzhu/gorm/utils.go:50 +0x219
Is it not possible to support custom primitives, and if not, is it possible to give a more detailed error message, it was difficult to try and work out what was wrong from that error message.
Hi,
I discovered a potential security issue with gorm.
In the following code:
DB.Where(models.User{Email: email}).First(&user)
if email
is nil, the condition seems to be just ignored, instead of where email is null
or something similar. In result, the first user is returned!
If email
is coming from params, the developer has to always check for nil values, it's a bit verbose and prone to errors.
Thanks
Hi,
will you be adding support to allow PostgreSQL's UUID data type to be used as primary keys? Instead of just int64.
If I had to do this myself which files and methods would I need to alter?
已知的一个问题是关于表名的引号, 生成的SQL语句如下
DROP TABLE 'user';
Mysql要求
DROP TABLE user;
其他INSERT等也有类似问题
Is it possible to leave deleted_at fields as NULL when inserting new records? For purposes of a standardized serialization response this seems to make the most sense.
Column names that are reserved words in Postgres don't get quoted properly, so Postgresql throws a syntax error.
db, _ := gorm.Open("postgres", "user=gorm dbname=gorm sslmode=disable")
type Foo struct {
When time.Time
}
f := Foo{}
err = db.Save(&f).Error
if err != nil {
panic(err)
}
Output:
panic: pq: syntax error at or near "when"
Postgres query log:
ERROR: syntax error at or near "when" at character 19
STATEMENT: INSERT INTO foos (when) VALUES ($1) RETURNING "id"
Hi!
There is code from readme
db.Where("name = ?", "jinzhu").Or("name = ?", "jinzhu 2").Find(&users).Count(&count)
//// SELECT * from USERS WHERE name = 'jinzhu' OR name = 'jinzhu 2'; (users)
//// SELECT count(*) FROM users WHERE name = 'jinzhu' OR name = 'jinzhu 2'; (count)
could you add another CountSomething()
db.Where("name = ?", "jinzhu").Or("name = ?", "jinzhu 2").Find(&users).CountSomething(&countfetchedrows)
what will return amount of fetched rows without executing additinal SQL SELECT count(*)
Currently if you insert/update an object with nested data, gorm sends sql update for nested data each time too.
For example, if you have Article with Author, every time you update Article additional sql update for Author will be sent.
Would be nice to have option to disable it.
Hi :)
Again me.
If the table has varchar(N) as a primary key I get
panic("unsupported sql adaptor, please submit an issue in github")
Would it be possible to add support of varchar for PKs?
Thank you in advance
func getPrimaryKeySqlType(adaptor string, column interface{}, size int) {
...
case "postgres":
switch column.(type) {
case int, int8, int16, int32, uint, uint8, uint16, uint32:
return "serial"
case int64, uint64:
return "bigserial"
}
}
}
I've design my function to accept *sql.DB as the parameter. This way it's general enough if in the feature we want to use basic driver or switch between ORM.
The way I do this right now is something like this.
func Users(source *sql.DB) (users []User) {
db := initGorm(source)
db.Table("user").Find(&users)
}
func initGorm(source *sql.DB) *gorm.DB {
result := gorm.SetDB("mysql", db)
return &result
}
// on gorm/main.go
func SetDB(driver string, dbSource *sql.DB) (db DB) {
db.db = dbSource
db.dialect = dialect.New(driver)
db.tagIdentifier = "sql"
db.parent = &db
return
}
Is this the right way to do this ? or gorm already have functionality that support this ?
in postgresql:
db.Table("my_table").Select("some, columns, count(distinct id) as dist").Group("some, columns").Order("dist desc").Limit(10).Rows()
results in:
SELECT some, columns, count(distinct columns) as dist FROM my_table ORDER BY dist desc LIMIT 10 GROUP BY some, columns
Should be:
SELECT ... FROM my_table GROUP BY ... ORDER BY ... LIMIT
Event the mysql documentation states:
In general, clauses used must be given in exactly the order shown in the syntax description.
so it might be best for cross languages to do something like:
func (s *Do) combinedSql() string {
return s.whereSql() + s.groupSql() + s.havingSql() + s.orderSql() + s.limitSql() + s.offsetSql()
}
I'll put this in a pull request for you to review.
Is it possible to configure Gorm to roll back automatically after each Revel test?
http://robfig.github.io/revel/manual/testing.html
For instance I have a method to promote a User from "admin" to "superadmin" and I have a func like below (untested code):
// app/models/user.go
import "db" // Contains the db setup
func (user *User) Promote (role string) {
user.Role = role
db.save(user)
}
And then I have a test:
func (t *AppTest) TestUserPromoteWorks() {
// Create and save user with role "admin"
t.AssertEqual("admin", user.Role)
// Update the user's role to super-admin and save
t.AssertEqual("superadmin", user.Role)
}
I don't want this user to exist in my test db after the test, so I would like to automatically roll back any changes to the database.
For byte[] fields
my model structure looks like bellow
type Status struct {
Id int64
AuthorId int64
Description string `sql:"size:255"`
PublishDate time.Time
}
When I create a new record & save
myStatus:= Status{
AuthorId : business1.Id,
Description: "I got stuck here",
PublishDate : time.Date(2013, time.January, 22, 23, 59, 59, 0, time.UTC),
}
DB.save(&myStatus)
it successfully save the record in MySQL database like bellow
+----+-----------+------------------+---------------------+
| id | author_id | description | publish_date |
+----+-----------+------------------+---------------------+
| 1 | 1 | I got stuck here | 2013-01-22 23:59:59 |
+----+-----------+------------------+---------------------+
when I try to retrieve the record from MySQL database, like bellow
var allStatus []Status
DB.Find(&allStatus)
I gives me following error
sql: Scan error on column index 3: unsupported driver -> Scan pair: []uint8 -> *time.Time
Hi !
As instance
How can I get 'connection lost' moment?
BTW, there is a list with original error codes http://www.postgresql.org/docs/9.3/static/errcodes-appendix.html what are not included into gorm.errors
Thank you in advance!
Is it possible to automigrate all structs automatically?
Currently it seems like the name of each struct to migrate needs to be passed to this function https://github.com/jinzhu/gorm/blob/690cb1430c2e27011324c51826301a7daf728e65/main.go#L261
Hi Jinzhu !
thank you for gorm. It's great. I started to use it recently.
I've faced one problem.
type Deposit struct {
Id int64
PaidDt time.Time
StateId int32
StateDt time.Time
Details sql.NullString
Amount float64
}
type Withdraw struct {
...
}
type Usage struct {
...
}
type Transaction struct {
Id int64
TypeId string
StateId int32
CreatedDt time.Time
CompletedDt olib.NullTime
DebitAccountId sql.NullInt64
DebitAmount float64
CreditAccountId sql.NullInt64
CreditAmount float64
// only one of 3 following columns has value (that's all are nullable)
DepositId sql.NullInt64 // works if change to int64
WithdrawId sql.NullInt64
UsageId sql.NullInt64
Deposit Deposit
Withdraw Withdraw
Usage Usage
}
func f (
t := Transaction {}
db.First(&t)
db.Model(&t).Related(&t.Deposit)
)
Related() does not work return value if t.DepositID is sql.NullInt64 and it works fine if change DepositId to int64
hi, just create a simple model that uses []string and it'll crash with something like this https://gist.github.com/AvianFlu/4688697c15b3587623a2
ie:
type User struct {
Id int64
Name string
Emails []string
}
Starting with your example;
type User struct {
Id int64 // Id: Primary key
................
Emails []Email // Embedded structs
BillingAddress Address // Embedded struct
BillingAddressId sql.NullInt64 // Embedded struct's foreign key
ShippingAddress Address // Embedded struct
ShippingAddressId int64 // Embedded struct's foreign key
IgnoreMe int64 `sql:"-"`
}
you are not creating foreign key constraints between two tables(User-Address), this is useful for data integrity.
The docs do not make it clear if Gorm uses transactions by default, such as with this example given (no sign of begin transaction
and commit
):
user := User{
Name: "jinzhu",
BillingAddress: Address{Address1: "Billing Address - Address 1"},
ShippingAddress: Address{Address1: "Shipping Address - Address 1"},
Emails: []Email{{Email: "[email protected]"}, {Email: "jinzhu-2@[email protected]"}},
}
db.Save(&user)
//// INSERT INTO "addresses" (address1) VALUES ("Billing Address - Address 1");
//// INSERT INTO "addresses" (address1) VALUES ("Shipping Address - Address 1");
//// INSERT INTO "users" (name,billing_address_id,shipping_address_id) VALUES ("jinzhu", 1, 2);
//// INSERT INTO "emails" (user_id,email) VALUES (111, "[email protected]");
//// INSERT INTO "emails" (user_id,email) VALUES (111, "[email protected]");
However the section on callbacks indicates that saves and deletes are run in transactions by default
// As you know, the save/delete operations are running in a transaction
// This is means all your changes will be rollbacked if get any errors
// If you want your changes in callbacks be run in the same transaction
// You have to pass the transaction as argument to the function
func (u *User) AfterCreate(tx *gorm.DB) (err error) {
tx.Model(u).Update("role", "admin")
return
}
Does Gorm use transactions for all saves and deletes by default? If so, perhaps the docs could indicate that right at the top?
使用mysql的时候如何在建表的时候指定存储引擎?
默认建的表不能使用事务
I use gorm with mysql on ubuntu,i find that the chatset in mysql is latin1
, not utf8
I stumbled onto a strange timezone bug while running tests. It could very well be my install of Go. I'm running 1.2rc5 on darwin_amd64. I'll see what I can dig up tomorrow, but I figured I'd write down my notes.
I expanded the test to add some debugging info.
func TestFindOrCreate(t *testing.T) {
...
var tmp User
db.Where(&User{Name: "find or create"}).Find(&tmp)
t.Logf("tmp=%v", tmp)
q := db.Where(&User{Name: "find or create"}).Assign(User{Age: 44}).FirstOrCreate(&user6)
if user6.Name != "find or create" || user6.Id == 0 || user6.Age != 44 {
t.Errorf("user should be found and updated with assigned attrs")
}
if q.Error != nil {
t.Errorf("Error: %v", q.Error)
}
...
}
Output:
-- FAIL: TestFindOrCreate (0.01 seconds)
gorm_test.go:1071: tmp={13 -0001-12-31 18:09:24 -0409 -0409 33 find or create 2013-11-23 22:48:56.622898 -0600 -0600 2013-11-23 22:48:56.6229 -0600 -0600 -0001-12-31 18:09:24 -0409 -0409 [] {0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} {0 false} {0 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} 0 {0 {0 false} 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC 0001-01-01 00:00:00 +0000 UTC} [] 0}
gorm_test.go:1078: Error: pq: invalid input syntax for type timestamp with time zone: "-0001-12-31T18:09:24-04:09"
gorm_test.go:1083: user should be found and updated with assigned attrs
FAIL
When I turn on query logging in GORM, I see this:
sql601.851usINSERT INTO users (birthday,age,deleted_at,password_hash,name,created_at,updated_at,billing_address_id,shipping_address_id) VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9) RETURNING "id"[0001-01-01 00:00:00 +0000 UTC 33 0001-01-01 00:00:00 +0000 UTC [] find or create 2013-11-23 22:57:58.690353832 -0600 CST 2013-11-23 22:57:58.690355235 -0600 CST {0 false} 0]
...
sql253.948usUPDATE users SET birthday = $1, age = $2, name = $3, created_at = $4, updated_at = $5, deleted_at = $6, shipping_address_id = $7, password_hash = $8, billing_address_id = $9 WHERE (deleted_at IS NULL OR deleted_at <= '0001-01-02') AND (id = $10) AND ((name = $11))[-0001-12-31 18:09:24 -0409 -0409 44 find or create 2013-11-23 22:57:58.690354 -0600 -0600 2013-11-23 22:57:58.698527043 -0600 CST -0001-12-31 18:09:24 -0409 -0409 0 [] {0 false} 13 find or create]
...
sql246.245usUPDATE users SET age = $1, updated_at = $2, deleted_at = $3, password_hash = $4, birthday = $5, name = $6, created_at = $7, billing_address_id = $8, shipping_address_id = $9 WHERE (deleted_at IS NULL OR deleted_at <= '0001-01-02') AND (id = $10) AND ((name = $11))[44 2013-11-23 22:38:37.686012577 -0600 CST -0001-12-31 18:09:24 -0409 -0409 [] -0001-12-31 18:09:24 -0409 -0409 find or create 2013-11-23 22:38:37.679395 -0600 -0600 {0 false} 0 13 find or create]
This is what I see in postgres after the test fails:
gorm=# select * from users where name='find or create';
-[ RECORD 1 ]-------+--------------------------------
id | 13
birthday | 0001-12-31 18:09:24-05:50:36 BC
age | 33
name | find or create
created_at | 2013-11-23 22:45:33.268583-06
updated_at | 2013-11-23 22:45:33.268584-06
deleted_at | 0001-12-31 18:09:24-05:50:36 BC
billing_address_id |
shipping_address_id | 0
password_hash | \x
Quite a few deleted_at dates have a strange timezone like this (all but one). I'll see what I can dig up tomorrow, but I'm going to crash for tonight.
I think I might also look at checking for query errors in tests. I think this is happening on the products table as well.
I see that gorm uses github.com/mattn/go-sqlite3 for the demos.
Is it possible to use gorm with another SQLite package?
For example: https://code.google.com/p/go-sqlite/
I like that one because it has SQLite backup functions support ( https://code.google.com/p/go-sqlite/source/browse/go1/sqlite3/backup.go ) but I'm not sure if I can use it with gorm.
I saw them in the code but they don't seem to work for now. What is the status?
It would be nice if a FindAll method is supported.
Find would find 1 row (limit 1),
FindAll would find all rows.
Currently using Find for both single and multiple results makes for code that is less clear in purpose than it could be
In the docs this example is given:
func (u *User) BeforeUpdate() (err error) {
if u.readonly() {
err = errors.New("Read Only User!")
}
return
}
Is it possible to define a callback that runs on all models, e.g. I want to automatically set a created_by_user_id field on every table?
(Please excuse my ignorance, I started learning Go 3 days ago)
I hope it would make debug process faster.
How would I best integrate the Revel logger (http://robfig.github.io/revel/manual/logging.html) with Gorm?
Would this work?
db.SetLogger(Revel.INFO)
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