chapakook / entgo-sample

golearn - ent (mac M1)

go module

go module setting

GO111MODULE state : off, on, auto(default)

• off : build package use $GOPATH
• on : build package use project module(go.mod)
• auto : build package if project is a module(go.mod) use it, there is no module(go.mod) use $GOPATH

go env -w GO111MODULE=[state]

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go get option

link : https://pkg.go.dev/cmd/go/internal/get

go get [-d] [-f] [-t] [-u] [-v] [-fix] [-insecure] [build flags] [packages]

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ent doc

link : https://entgo.io/docs/getting-started/

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go module create -> 'go.mod'

go mod init <project>

go module ent add -> 'go.mod'

go get entgo.io/ent/cmd/ent
go get -d entgo.io/ent/cmd/ent

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ent schema init

go run entgo.io/ent/cmd/ent init <schema> <schema> <>...

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schema setting

link : https://entgo.io/docs/schema-def

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generate schema

go generate ./ent

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mysql

1. driver add

go get github.com/go-sql-driver/mysql
go get -d github.com/go-sql-driver/mysql

2. open

import (
    ...
    _ "github.com/go-sql-driver/mysql"
)

func main() {
    client, err := ent.Open("mysql", "<user>:<password>@<protocol>(<host>:<port>)/<database>?parseTime=True")
    if err != nil {
        log.Fatal(err)
    }
    defer client.Close()
}

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SQLite3

1. driver add

go get github.com/mattn/go-sqlite3
go get -d github.com/mattn/go-sqlite3

2. open

import (
    ...
    _ "github.com/mattn/go-sqlite3"
)

func main() {
    client, err := ent.Open("sqlite3", "file:<file.db>?_fk=1")
    if err != nil {
        log.Fatal(err)
    }
    defer client.Close()
}

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PostgreSQL (here not use)

1. driver add

go get github.com/lib/pq
go get -d github.com/lib/pq

2. open

import (
    ...
    _ "github.com/lib/pq"
)

func main() {
    client, err := ent.Open("postgres","host=<host> port=<port> user=<user> dbname=<database> password=<password>")
    if err != nil {
        log.Fatal(err)
    }
    defer client.Close()
}

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