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Comments (6)

smallnest avatar smallnest commented on August 30, 2024

check whether your table Transaction has contains some fields.

I have test with employees database . It can generate those structs:

image

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smallnest avatar smallnest commented on August 30, 2024

you can add some logs before https://github.com/smallnest/gen/blob/master/dbmeta/meta.go#L90

to check what columns have been fetched.

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alex347 avatar alex347 commented on August 30, 2024

c.DatabaseTypeName() in https://github.com/smallnest/gen/blob/master/dbmeta/meta.go#L115
returns an empty string.

From docs:
"If an empty string is returned the driver type name is not supported"
https://golang.org/pkg/database/sql/#ColumnType.DatabaseTypeName
so it's something wrong with the mysql driver

Here is my table:

CREATE TABLE `example` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `c1` varchar(255) DEFAULT NULL,
  `c2` varchar(255) DEFAULT NULL,
  `c3` int(11) DEFAULT NULL,
  `c4` timestamp NULL DEFAULT NULL,
  `c5` varchar(32000) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

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smallnest avatar smallnest commented on August 30, 2024

Maybe you should update dependency libs or check where it can access your database by your connection string, or mysql version issues?

I have create the model by using your table:

package model

import (
	"database/sql"
	"time"

	"github.com/guregu/null"
)

var (
	_ = time.Second
	_ = sql.LevelDefault
	_ = null.Bool{}
)

type Example struct {
	ID int         `gorm:"column:id;primary_key" json:"id"`
	C1 null.String `gorm:"column:c1" json:"c1"`
	C2 null.String `gorm:"column:c2" json:"c2"`
	C3 null.Int    `gorm:"column:c3" json:"c3"`
	C4 null.Time   `gorm:"column:c4" json:"c4"`
	C5 null.String `gorm:"column:c5" json:"c5"`
}

// TableName sets the insert table name for this struct type
func (e *Example) TableName() string {
	return "example"
}

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alex347 avatar alex347 commented on August 30, 2024

updating dependencies solved it:
go get -u

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gipsh avatar gipsh commented on August 30, 2024

same problem here, i was using go 1.10 + mysql 7.
updated to go 1.12 and worked.

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