Golang map array sorted by field

Go-like two-dimensional arrays are classified by fields/map arrays are classified by fields

Raw data

data corresponding structure

type IgmsMenu struct {
	ID          uint             `gorm:"column:id;" json:"id"`
	CategoryId  int64            `gorm:"column:category_id;" json:"category_id"`
	Name        string           `gorm:"column:name;" json:"name"`
	Price       *decimal.Decimal `gorm:"column:price;type:decimal" json:"price"`
	Remark      string           `gorm:"column:remark;" json:"remark"`
	Status      int8             `gorm:"column:status;default:0;" json:"status"`
}

The json data returned by the original data is as follows:

 

data processing

need

The array classification needs to be done according to the category_id in the data .

principle

Since the data type of category_id is int64 , it is necessary to define a type of map[int64][]map[string]interface{} to accept the processed data.

• map[int64]: This layer is used to undertake various types of array sets after classification
• []map[string]interface{}: data array of a single class

the code

func LauwenDeal(infos []model.IgmsMenu) map[int64][]map[string]interface{} {
	res := make(map[int64][]map[string]interface{})
	for _, item := range infos {
		temp := map[string]interface{}{
			"id":     item.ID,
			"name":   item.Name,
			"price":  item.Price,
			"remark": item.Remark,
		}
		res[0] = append(res[0], temp)
		res[item.CategoryId] = append(res[item.CategoryId], temp)
	}

	return res
}

process result

The json data returned after processing