但这两张表没有关联字段,也就是说没有外键约束. 但我想在grail中查询两张表, 获取里面的name, password, age, email以及address等等. 条件是两个id相等.
这时候如何做呢??? 目前为止我想到的就是使用Spring中的JdbcTemplate来处理SQL语句:
class User {
String name
String password
}
class UserInfo {
int age
String email
String address
}
在controller中写:
def dataSource
def list = {
def template = new JdbcTemplate(dataSource)
def userList = template.queryForList("select ui.name as name, u.password as password, ui.age as age, ui.email as email, ui.address as address from user u, user_info ui where u.id = ui.id");
def map = [userList : userList]
render(view:"list", model:map)
}
在gsp中只要使用as后面的别名来取对应的值就可以了.
<table>
<thead>
<tr>
<g:sortableColumn property="name" title="Name" />
<g:sortableColumn property="password" title="Password" />
<g:sortableColumn property="email" title="Emial" />
<g:sortableColumn property="age" title="Age" />
<g:sortableColumn property="address" title="Address" />
</tr>
</thead>
<tbody>
<g:each in="${userList}" status="i" var="user">
<tr class="${(i % 2) == 0 ? 'odd' : 'even'}">
<td>${user.name}</td>
<td>${user.password}</td>
<td>${user.email}</td>
<td>${user.age}</td>
<td>${user.address}</td>
</tr>
</g:each>
</tbody>
</table>