The Struct:

type CardConfigFeatures struct {
   // Base Entity
   b.Base
   // Card Config ID
   CardConfigId uuid.UUID `gorm:"type:uuid; references CardConfig(id); uniqueIndex:idx_key_card_config_id ;" json:"cardConfigId"` // Key of the feature
   // This index should be made up of two columns: CardConfigId + Key
   Key string `gorm:"uniqueIndex:idx_key_card_config_id;" json:"key"`
   // Value of the feature
   Value bool `json:"value"`
}

The Database: Gorm uniqueIndex space issue Gorm uniqueIndex space issue There is a space in the struct:

`gorm:"type:uuid; references CardConfig(id); uniqueIndex:idx_key_card_config_id ;" json:"cardConfigId"`
idx_key_card_config_id ;

Without this space: Gorm uniqueIndex space issue

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