我需要帮助。我正在使用HQL,但我停留在此代码中,我不知道如何解决它。
def deposit = Deposit.executeQuery("select terminalID,deposit,created_at from Deposit")
我得到这样的正确结果[[1, 1000, 2020-07-29 13:29:28.0], [0, 1, 2020-07-29 13:42:11.0], [2, 1000, 2020-07-29 13:50:08.0], [0, 1, 2020-07-29 14:03:07.0]]
但是在 View 页面中,由于没有这样的属性,我无法调用terminalID,deposit,created_at如果我用
def deposit = Deposit.executeQuery("from Deposit")
我得到这样的错误结果[com.dm.Bank.Deposit:ID][com.dm.Bank.Deposit : 2, com.dm.Bank.Deposit : 2, com.dm.Bank.Deposit : 3, com.dm.Bank.Deposit : 2]
数据库存款:编号为auto_increment
存款结果与不同
数据库:
class Deposit implements Validateable{
String number
String id
String terminalID
String startDate
String endDate
String currency
String startBalance
String transactionDate
String branchCode
String transactionType
String transactionAmount
String currentBalance
String deposit
String transactionName
String trailer
String corporateId
String accountNumber
String created_at
String company
static mapping = {
datasource 'DBTarget'
table 'HISTORY_MUTASI'
number column: "Number"
id generator: 'assigned', column: "ID"
terminalID column: "TerminalID"
startDate column: "StartDate"
endDate column: "EndDate"
currency column: "Currency"
startBalance column: "StartBalance"
transactionDate column: "TransactionDate"
branchCode column: "BranchCode"
transactionType column: "TransactionType"
transactionAmount column: "TransactionAmount"
currentBalance column: "CurrentBalance"
deposit column: "Deposit"
transactionName column: "TransactionName"
trailer column: "Trailer"
corporateId column: "CorporateId"
accountNumber column: "AccountNumber"
created_at column: "created_at"
company column: "Company"
version false
}
static constraints = {
number unique:true,generator:"increment";
}
最佳答案
恕我直言,了解executeQuery
如何返回非常重要。
The executeQuery method allows the execution of arbitrary HQL queries. HQL queries can return domain class instances, or Arrays of specified data when the query selects individual fields or calculated values. Read more executeQuery from Grails documentation.
正如我看到的结果格式,您必须使用基于索引的操作。
例如,我们可以在如下 View 中显示结果。
<g:each in="${deposit}" var="entry">
<p>TerminalID: ${entry[0]} with the deposit ${entry[1]} issued at ${entry[2]}</p>
</g:each>
关于hibernate - 从Hibernate Grails中选择数据库,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63223391/