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postgres.go
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postgres.go
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package postgres
import (
"fmt"
"os"
postgresDb "gorm.io/driver/postgres"
"gorm.io/gorm"
)
// sanityCheck checks if the environment variables are set.
func sanityCheck() {
if _, ok := os.LookupEnv("POSTGRES_HOST"); !ok {
panic("POSTGRES_HOST environment variable is not set")
}
if _, ok := os.LookupEnv("POSTGRES_USER"); !ok {
panic("POSTGRES_USER environment variable is not set")
}
if _, ok := os.LookupEnv("POSTGRES_PASSWORD"); !ok {
panic("POSTGRES_PASSWORD environment variable is not set")
}
if _, ok := os.LookupEnv("POSTGRES_DB"); !ok {
panic("POSTGRES_DB environment variable is not set")
}
}
// GetPostgresConnection returns a PostgreSQL database connection using the environment variables:
// POSTGRES_HOST, POSTGRES_USER, POSTGRES_PASSWORD and POSTGRES_DB.
func GetPostgresConnection() *gorm.DB {
sanityCheck()
host := os.Getenv("POSTGRES_HOST")
user := os.Getenv("POSTGRES_USER")
password := os.Getenv("POSTGRES_PASSWORD")
database := os.Getenv("POSTGRES_DB")
dsn := fmt.Sprintf(
"host=%s user=%s password=%s dbname=%s port=5432 sslmode=disable TimeZone=UTC",
host,
user,
password,
database,
)
DB, err := gorm.Open(
postgresDb.Open(dsn),
&gorm.Config{},
)
if err != nil {
panic("Unable to connect to database")
}
return DB
}
func ClosePostgresConnection(conn *gorm.DB) {
sqlDB, _ := conn.DB()
_ = sqlDB.Close()
}