db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})

[kernelpod]

runtime error: invalid memory address or nil pointer dereference，runtime error: invalid memory address or nil pointer dereference

runtime error: invalid memory address or nil pointer dereference

runtime error: invalid memory address or nil pointer dereference C:/src/runtime/panic.go:262 (0x3a3337) panicmem: panic(memoryError) C:/src/runtime/signal_windows.go:401 (0x3a3307) sigpanic: panicmem() C:/pkg/mod/gorm.io/gorm@v1.26.0/gorm.go:418 (0x522492) (*DB).getInstance: if db.clone > 0 { C:/pkg/mod/gorm.io/gorm@v1.26.0/chainable_api.go:113 (0x51c471) (*DB).Select: tx = db.getInstance() C:/pkg/User.go:20 (0x651bad) CheckUser: db.Select("id").Where("username = ?", name).First(&user) C:/pkg/user.go:18 (0x7b3504) AddUser: code = model.CheckUser(data.Username) C:/pkg/mod/github.com/gin-gonic/gin@v1.10.0/context.go:185 (0x7ad5ce) (*Context).Next: c.handlers[c.index](c) C:/pkg/mod/github.com/gin-gonic/gin@v1.10.0/recovery.go:102 (0x7ad5bb) CustomRecoveryWithWriter.func1: c.Next() C:/pkg/mod/github.com/gin-gonic/gin@v1.10.0/context.go:185 (0x7ac704) (*Context).Next: c.handlers[c.index](c) C:/pkg/mod/github.com/gin-gonic/gin@v1.10.0/logger.go:249 (0x7ac6eb) LoggerWithConfig.func1: c.Next() C:/pkg/mod/github.com/gin-gonic/gin@v1.10.0/context.go:185 (0x7abb51) (*Context).Next: c.handlers[c.index](c) C:/pkg/mod/github.com/gin-gonic/gin@v1.10.0/gin.go:633 (0x7ab5e0) (*Engine).handleHTTPRequest: c.Next() C:/pkg/mod/github.com/gin-gonic/gin@v1.10.0/gin.go:589 (0x7ab269) (*Engine).ServeHTTP: engine.handleHTTPRequest(c) C:/src/net/http/server.go:3301 (0x6a0a0d) serverHandler.ServeHTTP: handler.ServeHTTP(rw, req) C:/src/net/http/server.go:2102 (0x696a44) (*conn).serve: serverHandler{c.server}.ServeHTTP(w, w.req) C:/src/runtime/asm_amd64.s:1700 (0x3c7180) goexit: BYTE $0x90 // NOP

Expected answer

db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{}
change
db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{}
that's ok
Is this a bug? Or is there something wrong with the code I wrote?

[kernelpod]

The official website document is written like this, and the test still does not work when compared with the example given on the official website. The problem here is pointed out through the cursor.

go 1.24.2

require (
github.com/gin-gonic/gin v1.10.0
gorm.io/gorm v1.26.0
)