Grails 2.4.4 executeQuery()从数据库的表连接表
这是我的域的代码Grails 2.4.4 executeQuery()从数据库的表连接表,grails,gorm,executequery,Grails,Gorm,Executequery,这是我的域的代码 class Btr { Date dateBreak int timeBreak String typeBreak User usuario static constraints = { } static mapping = { } } class User { String name String user String password String confi
class Btr {
Date dateBreak
int timeBreak
String typeBreak
User usuario
static constraints = {
}
static mapping = {
}
}
class User {
String name
String user
String password
String confirmPassword
String state
String extent
String movileNumber
String email
String address
Rol rol
static constraints = {
}
static mapping = {
}
}
这是我的控制器的代码
def df = new SimpleDateFormat("yyyy-MM-dd HH:mm")
def startDate = params.startDate
def stopDate = params.stopDate
resultado = Btr .executeQuery("select dateBreak, timeBreak, typeBreak,
user, usuario.rol from Btr inner join User on user = usuario.rol where
dateBreak between :startDate" and :stopDate", [startDate:
df.parse(startDate), stopDate: df.parse(stopDate)])
render (view: "data", model: [result: resultado])
这是我的看法
<g:each in="${result}" var="results" status="i">
<tr><td>{results.dateBreak}</td><td>{results.timeBreak}</td><td>
{results.typeBreak} </td><td>${results.usuario.rol}</td></tr>
</g:each>
有人能告诉我如何用executeQuery连接grails中的表吗?如果能学会用Criteria连接表,那将是一件很好的事情
resultado = Btr .executeQuery("select dateBreak, timeBreak, typeBreak,
user, usuario.rol from Btr inner join User on user = usuario.rol where
dateBreak between :startDate" and :stopDate", [startDate:
df.parse(startDate), stopDate: df.parse(stopDate)])
应该是
resultado = Btr .executeQuery("""select new map (btr.dateBreak as dateBreak, btr.timeBreak as timeBreak, btr.typeBreak as typeBreak,
u as user, user.usuario.rol as rol) from Btr btr join btr.user u where
btr.dateBreak between :startDate and :stopDate""", [startDate:
df.parse(startDate), stopDate: df.parse(stopDate)])
您拥有的是原始sql,而不是HQL,HQL只是一个微小的变化,它使用实际的域对象来连接
对hasMany使用左连接,对于典型的一对一关系,它可能是空连接
如果一对一关系可以为空,也可以使用左连接
除此之外,您还可以将实际查询作为原始sql查询,如下所示
def sql=new Sql(dataSource)
return sql.rows(query,whereParams)
应该是
resultado = Btr .executeQuery("""select new map (btr.dateBreak as dateBreak, btr.timeBreak as timeBreak, btr.typeBreak as typeBreak,
u as user, user.usuario.rol as rol) from Btr btr join btr.user u where
btr.dateBreak between :startDate and :stopDate""", [startDate:
df.parse(startDate), stopDate: df.parse(stopDate)])
您拥有的是原始sql,而不是HQL,HQL只是一个微小的变化,它使用实际的域对象来连接
对hasMany使用左连接,对于典型的一对一关系,它可能是空连接
如果一对一关系可以为空,也可以使用左连接
除此之外,您还可以将实际查询作为原始sql查询,如下所示
def sql=new Sql(dataSource)
return sql.rows(query,whereParams)