102 lines
2.4 KiB
Go
102 lines
2.4 KiB
Go
package database
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import (
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"fmt"
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"log"
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"os"
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"time"
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"carrotskin/pkg/config"
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"gorm.io/driver/postgres"
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"gorm.io/gorm"
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"gorm.io/gorm/logger"
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)
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// New 创建新的PostgreSQL数据库连接
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func New(cfg config.DatabaseConfig) (*gorm.DB, error) {
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dsn := fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s TimeZone=%s",
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cfg.Host,
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cfg.Port,
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cfg.Username,
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cfg.Password,
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cfg.Database,
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cfg.SSLMode,
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cfg.Timezone,
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)
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// 配置慢查询监控
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newLogger := logger.New(
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log.New(os.Stdout, "\r\n", log.LstdFlags),
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logger.Config{
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SlowThreshold: 200 * time.Millisecond, // 慢查询阈值：200ms
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LogLevel: logger.Warn, // 只记录警告和错误
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IgnoreRecordNotFoundError: true, // 忽略记录未找到错误
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Colorful: false, // 生产环境禁用彩色
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},
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)
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// 打开数据库连接
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db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{
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Logger: newLogger,
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DisableForeignKeyConstraintWhenMigrating: true, // 禁用外键约束
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PrepareStmt: true, // 启用预编译语句缓存
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QueryFields: true, // 明确指定查询字段
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})
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if err != nil {
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return nil, fmt.Errorf("连接PostgreSQL数据库失败: %w", err)
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}
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// 获取底层SQL数据库实例
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sqlDB, err := db.DB()
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if err != nil {
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return nil, fmt.Errorf("获取数据库实例失败: %w", err)
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}
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// 优化连接池配置
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maxIdleConns := cfg.MaxIdleConns
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if maxIdleConns <= 0 {
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maxIdleConns = 10
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}
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maxOpenConns := cfg.MaxOpenConns
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if maxOpenConns <= 0 {
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maxOpenConns = 100
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}
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connMaxLifetime := cfg.ConnMaxLifetime
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if connMaxLifetime <= 0 {
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connMaxLifetime = 1 * time.Hour
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}
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connMaxIdleTime := cfg.ConnMaxIdleTime
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if connMaxIdleTime <= 0 {
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connMaxIdleTime = 10 * time.Minute
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}
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sqlDB.SetMaxIdleConns(maxIdleConns)
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sqlDB.SetMaxOpenConns(maxOpenConns)
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sqlDB.SetConnMaxLifetime(connMaxLifetime)
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sqlDB.SetConnMaxIdleTime(connMaxIdleTime)
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// 测试连接
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if err := sqlDB.Ping(); err != nil {
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return nil, fmt.Errorf("数据库连接测试失败: %w", err)
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}
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return db, nil
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}
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// GetDSN 获取数据源名称
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func GetDSN(cfg config.DatabaseConfig) string {
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return fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s sslmode=%s TimeZone=%s",
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cfg.Host,
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cfg.Port,
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cfg.Username,
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cfg.Password,
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cfg.Database,
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cfg.SSLMode,
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cfg.Timezone,
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)
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}
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