golang gorm postgres setup

Author: wpcodevo

.gitignore

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+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+.DS_Store
+TODO.md
+logs.txt
+.idea/
+secret.md
+app.env

docker-compose.yml

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+services:
+  postgres:
+    image: postgres
+    container_name: postgres
+    ports:
+      - 6500:5432
+    env_file:
+      - ./app.env
+    volumes:
+      - postgres:/var/lib/postgresql/data
+volumes:
+  postgres:

go.mod

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+module github.com/wpcodevo/golang-gorm-postgres
+
+go 1.18
+
+require (
+	github.com/spf13/viper v1.12.0
+	gorm.io/driver/postgres v1.3.8
+	gorm.io/gorm v1.23.8
+)
+
+require (
+	github.com/fsnotify/fsnotify v1.5.4 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/gin-gonic/gin v1.8.1 // indirect
+	github.com/go-playground/locales v0.14.0 // indirect
+	github.com/go-playground/universal-translator v0.18.0 // indirect
+	github.com/go-playground/validator/v10 v10.11.0 // indirect
+	github.com/goccy/go-json v0.9.10 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/jackc/chunkreader/v2 v2.0.1 // indirect
+	github.com/jackc/pgconn v1.12.1 // indirect
+	github.com/jackc/pgio v1.0.0 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgproto3/v2 v2.3.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20200714003250-2b9c44734f2b // indirect
+	github.com/jackc/pgtype v1.11.0 // indirect
+	github.com/jackc/pgx/v4 v4.16.1 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.4 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/magiconair/properties v1.8.6 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml v1.9.5 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.2 // indirect
+	github.com/spf13/afero v1.8.2 // indirect
+	github.com/spf13/cast v1.5.0 // indirect
+	github.com/spf13/jwalterweatherman v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/subosito/gotenv v1.3.0 // indirect
+	github.com/ugorji/go/codec v1.2.7 // indirect
+	golang.org/x/crypto v0.0.0-20220722155217-630584e8d5aa // indirect
+	golang.org/x/net v0.0.0-20220805013720-a33c5aa5df48 // indirect
+	golang.org/x/sys v0.0.0-20220804214406-8e32c043e418 // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/ini.v1 v1.66.4 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

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+package initializers
+
+import (
+	"fmt"
+	"log"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+var DB *gorm.DB
+
+func ConnectDB(config *Config) {
+	var err error
+	dsn := fmt.Sprintf("host=%s user=%s password=%s dbname=%s port=%s sslmode=disable TimeZone=Asia/Shanghai", config.DBHost, config.DBUserName, config.DBUserPassword, config.DBName, config.DBPort)
+
+	DB, err = gorm.Open(postgres.Open(dsn), &gorm.Config{})
+	if err != nil {
+		log.Fatal("Failed to connect to the Database")
+	}
+	fmt.Println("🚀 Connected Successfully to the Database")
+}

initializers/connectDB.go

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+package initializers
+
+import (
+	"github.com/spf13/viper"
+)
+
+type Config struct {
+	DBHost         string `mapstructure:"POSTGRES_HOST"`
+	DBUserName     string `mapstructure:"POSTGRES_USER"`
+	DBUserPassword string `mapstructure:"POSTGRES_PASSWORD"`
+	DBName         string `mapstructure:"POSTGRES_DB"`
+	DBPort         string `mapstructure:"POSTGRES_PORT"`
+	ServerPort     string `mapstructure:"PORT"`
+
+	ClientOrigin string `mapstructure:"CLIENT_ORIGIN"`
+}
+
+func LoadConfig(path string) (config Config, err error) {
+	viper.AddConfigPath(path)
+	viper.SetConfigType("env")
+	viper.SetConfigName("app")
+
+	viper.AutomaticEnv()
+
+	err = viper.ReadInConfig()
+	if err != nil {
+		return
+	}
+
+	err = viper.Unmarshal(&config)
+	return
+}

initializers/loadEnv.go

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+package main
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/wpcodevo/golang-gorm-postgres/initializers"
+)
+
+var (
+	server *gin.Engine
+)
+
+func init() {
+	config, err := initializers.LoadConfig(".")
+	if err != nil {
+		log.Fatal("🚀 Could not load environment variables", err)
+	}
+
+	initializers.ConnectDB(&config)
+
+	server = gin.Default()
+}
+
+func main() {
+	config, err := initializers.LoadConfig(".")
+	if err != nil {
+		log.Fatal("🚀 Could not load environment variables", err)
+	}
+
+	router := server.Group("/api")
+	router.GET("/healthchecker", func(ctx *gin.Context) {
+		message := "Welcome to Golang with Gorm and Postgres"
+		ctx.JSON(http.StatusOK, gin.H{"status": "success", "message": message})
+	})
+
+	log.Fatal(server.Run(":" + config.ServerPort))
+}

main.go

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+exit status 0xc000013aexit status 2