我已經(jīng)創(chuàng)建了一個(gè)工作正常的 API，但出現(xiàn)了類似的錯(cuò)誤運(yùn)行時(shí)錯(cuò)誤：無(wú)效的內(nèi)存地址或零指針取消引用當(dāng)執(zhí)行單元測(cè)試代碼時(shí)。完整回復(fù)供您參考runtime error: invalid memory address or nil pointer dereferenceD:/Go/src/runtime/panic.go:199 (0x447473)    panicmem: panic(memoryError)D:/Go/src/runtime/signal_windows.go:233 (0x447320)    sigpanic: panicmem()D:/Projects/GoLang/cloudfactory-backend/db/teams.go:11 (0xb49b36)    SelectAllTeams: func SelectAllTeams() (teams []models.Team, err error) {D:/Projects/GoLang/cloudfactory-backend/services/teams.go:11 (0xbb09ec)    GetTeams: teams, err = db.SelectAllTeams()D:/Projects/GoLang/cloudfactory-backend/controllers/api.go:32 (0xbb1b51)    ApiController.GetTeams: teams, err := services.GetTeams()C:/Users/justin.joseph/go/pkg/mod/github.com/gin-gonic/gin@v1.4.0/context.go:124 (0x9f7da1)    (*Context).Next: c.handlers[c.index](c)D:/Projects/GoLang/cloudfactory-backend/middlewares/db_logger.go:72 (0xc30430)    DBLogger.func1: c.Next()C:/Users/justin.joseph/go/pkg/mod/github.com/gin-gonic/gin@v1.4.0/context.go:124 (0x9f7da1)    (*Context).Next: c.handlers[c.index](c)C:/Users/justin.joseph/go/pkg/mod/github.com/gin-gonic/gin@v1.4.0/recovery.go:83 (0xa0b2ca)    RecoveryWithWriter.func1: c.Next()C:/Users/justin.joseph/go/pkg/mod/github.com/gin-gonic/gin@v1.4.0/context.go:124 (0x9f7da1)    (*Context).Next: c.handlers[c.index](c)C:/Users/justin.joseph/go/pkg/mod/github.com/gin-gonic/gin@v1.4.0/logger.go:240 (0xa0a357)    LoggerWithConfig.func1: c.Next()C:/Users/justin.joseph/go/pkg/mod/github.com/gin-gonic/gin@v1.4.0/context.go:124 (0x9f7da1)    (*Context).Next: c.handlers[c.index](c)C:/Users/justin.joseph/go/pkg/mod/github.com/gin-gonic/gin@v1.4.0/gin.go:389 (0xa01798)    (*Engine).handleHTTPRequest: c.Next() C:/Users/justin.joseph/go/pkg/mod/github.com/gin-gonic/gin@v1.4.0/gin.go:351 (0xa00fba)    (*Engine).ServeHTTP: engine.handleHTTPRequest(c)