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fix: fix random selection is not working when directly using database

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This commit is contained in:
JustSong 2023-09-18 22:39:10 +08:00
parent 159b9e3369
commit 37e09d764c
1 changed files with 5 additions and 3 deletions
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8
model/ability.go
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@ -10,16 +10,18 @@ type Ability struct {
Model string `json:"model" gorm:"primaryKey;autoIncrement:false"`
ChannelId int `json:"channel_id" gorm:"primaryKey;autoIncrement:false;index"`
Enabled bool `json:"enabled"`
Priority *int64 `json:"priority" gorm:"bigint;default:0"`
Priority *int64 `json:"priority" gorm:"bigint;default:0;index"`
}
func GetRandomSatisfiedChannel(group string, model string) (*Channel, error) {
ability := Ability{}
var err error = nil
if common.UsingSQLite {
err = DB.Where("`group` = ? and model = ? and enabled = 1", group, model).Order("CASE WHEN priority <> 0 THEN priority ELSE RANDOM() END DESC ").Limit(1).First(&ability).Error
maxPrioritySubQuery := DB.Model(&Ability{}).Select("MAX(priority)").Where("`group` = ? and model = ? and enabled = 1", group, model)
err = DB.Where("`group` = ? and model = ? and enabled = 1 and priority = (?)", group, model, maxPrioritySubQuery).Order("RANDOM()").Limit(1).First(&ability).Error
} else {
err = DB.Where("`group` = ? and model = ? and enabled = 1", group, model).Order("CASE WHEN priority <> 0 THEN priority ELSE RAND() END DESC").Limit(1).First(&ability).Error
maxPrioritySubQuery := DB.Model(&Ability{}).Select("MAX(priority)").Where("group = ? and model = ? and enabled = 1", group, model)
err = DB.Where("`group` = ? and model = ? and enabled = 1 and priority = (?)", group, model, maxPrioritySubQuery).Order("RAND()").Limit(1).First(&ability).Error
}
if err != nil {
return nil, err