youtube-golang/main_program/service/KeyWordService.go

package service

import (
	"errors"
	"main_program/common"
	"main_program/entity"
)

type keywordService struct{}

var KeywordService keywordService

func (k *keywordService) QueryKeywordsByRegion(region string) (keywords []entity.Keyword, err error) {
	var keywordEntitys []entity.Keyword
	result := common.MysqlDB.Where(&entity.Keyword{Region: region}).Find(&keywordEntitys)
	if result.Error != nil {
		return nil, errors.New("query keywords faild")
	} else {
		return keywordEntitys, nil
	}
}