{"id":"7c44ee5d77aa7914","repo":"jackc/pgx","slug":"cannot-scan-t-7c44ee","errorCode":null,"errorMessage":"cannot scan %T","messagePattern":"cannot scan %T","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pgtype/float8.go","lineNumber":68,"sourceCode":"\tif src == nil {\n\t\t*f = Float8{}\n\t\treturn nil\n\t}\n\n\tswitch src := src.(type) {\n\tcase float64:\n\t\t*f = Float8{Float64: src, Valid: true}\n\t\treturn nil\n\tcase string:\n\t\tn, err := strconv.ParseFloat(src, 64)\n\t\tif err != nil {\n\t\t\treturn err\n\t\t}\n\t\t*f = Float8{Float64: n, Valid: true}\n\t\treturn nil\n\t}\n\n\treturn fmt.Errorf(\"cannot scan %T\", src)\n}\n\n// Value implements the [database/sql/driver.Valuer] interface.\nfunc (f Float8) Value() (driver.Value, error) {\n\tif !f.Valid {\n\t\treturn nil, nil\n\t}\n\treturn f.Float64, nil\n}\n\n// MarshalJSON implements the [encoding/json.Marshaler] interface.\nfunc (f Float8) MarshalJSON() ([]byte, error) {\n\tif !f.Valid {\n\t\treturn []byte(\"null\"), nil\n\t}\n\treturn json.Marshal(f.Float64)\n}\n","sourceCodeStart":50,"sourceCodeEnd":86,"githubUrl":"https://github.com/jackc/pgx/blob/ec1a0befd22592cffffdeeb0a50311b506372f4c/pgtype/float8.go#L50-L86","documentation":"Error \"cannot scan %T\" thrown in jackc/pgx.","triggerScenarios":"Thrown at pgtype/float8.go:68 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"analyzedSha":"ec1a0befd22592cffffdeeb0a50311b506372f4c","analyzedAt":"2026-08-04T22:52:11.263Z","schemaVersion":2}