go-carbon1.2.0 is released! Improve and optimize multi-scenario support for ORM

The following is the tutorial column of golang to introduce the go-carbon 1.2.0 version to you, I hope it will be helpful to friends in need!

carbon is a lightweight, semantic, developer-friendly Golang time processing library that supports chain calls and mainstream ORMs such as gorm and xrom

If you think it is good, please give it a star

github:github.com/golang-module/carbon

gitee:gitee.com/go-package/carbon

Installation and use

// 使用github库
go get -u github.com/golang-module/carbon

import (
 "github.com/golang-module/carbon")

// 使用gitee库
go get -u gitee.com/go-package/carbon

import (
 "gitee.com/go-package/carbon")

Database support

Assume that the data table is users, and the fields are id(int), name(varchar), age(int), graduated_at( date), birthday(date), created_at(datetime), updated_at(datetime), deleted_at(datetime)

Define the model

type UserModel struct {
 ID  int64  `json:"id"` Name string `json:"name"` Age int `json:"age"` Birthday carbon.Carbon `json:"birthday"` CreatedAt carbon.ToDateTimeString `json:"created_at"` DeletedAt carbon.ToTimestamp `json:"deleted_at"` GraduatedAt carbon.ToDateString `json:"graduated_at"` UpdatedAt carbon.ToTimeString `json:"updated_at"`}

Instantiate the model

user := UserModel {
 Name: "勾国印", Age: 18, Birthday: carbon.Now().SubYears(18), CreatedAt: carbon.ToDateTimeString{carbon.Now()}, DeletedAt: carbon.ToTimestamp{carbon.Parse("2020-08-05 13:14:15")}, GraduatedAt: carbon.ToDateString{carbon.Parse("2012-09-09")}, UpdatedAt: carbon.ToTimeString{carbon.Now()},}

Output model fields

user.ID // 18
user.Name // 勾国印
user.Birthday.ToDateString() // 2012-08-05
user.CreatedAt.ToTimestamp() // 2012-08-05 13:14:15
user.DeletedAt.ToDateTimeString() // 1596604455
user.GraduatedAt.AddDay().ToDateString() // 2012-09-10
user.UpdatedAt.ToDateString() // 2012-08-05

JSON output model

data, _ := json.Marshal(&user)
fmt.Print(string(data))
// 输出
{
 "id": 42, "name": "勾国印", "age": 18, "birthday": "2012-08-05 00:00:00", "created_at": "2020-08-05 13:14:15", "deleted_at": 1596604455 "graduated_at": "2012-09-09", "updated_at": "13:14:15",}

Update log

• Perfect unit testing, code coverage 100%
• Improve and optimize multi-scenario support for ORM
• Added English version of README.MD documentation
• Unified exception handling
• Unified output function naming rules, Format() changed to ToFormatString()
• Added CreateFromGoTime(t time.Time) method to create Carbon instance from native time.Time
• Optimize the code organization structure and unify the final methods that are not inheritable Put it in the final.go file
• Abandon the New() initialization function and use it directly without initialization
• Add multiple time format outputs, such as Cookie, W3C, RSS, RFC7231
• New ParseByDuration() method parses duration string (relative to today), supports positive and negative integers/floating point numbers and symbols ns (nanoseconds), us (microseconds), ms (milliseconds), s (seconds) , m (minutes), h (hours) combination
• Added NextYears(), NextYear(), PreYears(), PreYear() methods to prevent the phenomenon of crossing months when adding/subtracting the specified year
• Added NextMonths(), NextMonth(), PreMonths(), and PreMonth() methods to prevent the phenomenon of crossing months after adding/reducing the specified month
• Added DaysInYear() method to obtain this The total number of days in the year
• Add the DaysInMonth() method to get the total number of days in this month
• Add the MonthOfYear() method to get the month of the year
• Add the DayOfYear () method to get the day of the year
• New DayOfMonth() method to get the day of the month
• New DayOfWeek() method to get the day of the week
• Added WeekOfYear() method to get the week of this year
• Added WeekOfMonth() method to get the week of this month
• Added IsZero() method to determine whether It is a zero value time
• Added IsFuture() method to determine whether it is future time
• Added IsPast() method to determine whether it is past time
• Added IsNow() method Determine whether it is the current time

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