@Query("UPDATE RealEstateDatabase SET type = :entryType WHERE id = :id AND type NOT LIKE :entryType")
suspend fun updateRealEstate(entryType: String, id: String)
此代码可以根据条件完美地更新表中的行。我想对每个链接到条件的多个行执行相同的操作
此处是相关实体/表
@Entity
@Parcelize
data class RealEstateDatabase(
@PrimaryKey
var id: String,
var type: String? = null,
var price: Int? = null,
var area: Int? = null,
var numberRoom: String? = null,
var description: String? = null,
var numberAndStreet: String? = null,
var numberApartment: String? = null,
var city: String? = null,
var region: String? = null,
var postalCode: String? = null,
var country: String? = null,
var status: String? = null,
var dateOfEntry: String? = null,
var dateOfSale: String? = null,
var realEstateAgent: String? = null,
var lat: Double ?=null,
var lng: Double ?=null,
var hospitalsNear : Boolean = false,
var schoolsNear : Boolean = false,
var shopsNear : Boolean = false,
var parksNear : Boolean = false,
@ColumnInfo(name = "listPhotoWithText")
var listPhotoWithText : List<PhotoWithTextFirebase> ?=null,
var count_photo : Int? = listPhotoWithText?.size,
)
我也把我的存储库的方法,这个方法有与我的表相同类型的参数来修改
override suspend fun updateRealEstate(
id: String,
entryType: String,
entryPrice: String,
entryArea: String,
entryNumberRoom: String,
entryDescription: String,
entryNumberAndStreet: String,
entryNumberApartement: String,
entryCity: String,
entryRegion: String,
entryPostalCode: String,
entryCountry: String,
entryStatus: String,
textDateOfEntry: String,
textDateOfSale: String,
realEstateAgent: String?,
lat: Double?,
lng: Double?,
checkedStateHopital: MutableState<Boolean>,
checkedStateSchool: MutableState<Boolean>,
checkedStateShops: MutableState<Boolean>,
checkedStateParks: MutableState<Boolean>,
listPhotoWithText: List<PhotoWithTextFirebase>?,
itemRealEstate: RealEstateDatabase
): Response<Boolean> {
return try {
Response.Loading
val rEcollection = firebaseFirestore.collection("real_estates")
if(entryType != itemRealEstate.type ){
rEcollection.document(id).update("type",entryType)
}
realEstateDao.updateRealEstate(entryType,id)
Response.Success(true)
}catch (e: Exception) {
Response.Failure(e)
}
}
我重复一遍,我想更新表中的行,条件是由我的repo的方法给出的变量与所讨论的行不同
@Query("UPDATE RealEstateDatabase SET " +
"type = (CASE WHEN type NOT LIKE :entryType THEN (:entryType) ELSE type END) ," +
"price = (CASE WHEN price NOT LIKE :entryPrice THEN (:entryPrice) ELSE price END) WHERE id =:id")
suspend fun updateRealEstate(
entryType: String,
id: String,
entryPrice: Int
)
此解决方案有效,但仍强制我更新值
1条答案
按热度按时间6mzjoqzu1#
您可以在
WHERE
子句中添加一个条件,如果两个列都不**需要更新,该条件将阻止UPDATE
语句的执行: