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模型(暴露映射表许多一对多关系):本地查询省略/忽略投影用“选择”
public class TeamUsers
{
[Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public long TeamUsersId { get; set; }
public Team Team { get; set; }
public User User { get; set; }
public bool Temporary { get; set; }
}
两个远程和本地查询的一般方法:
getAllOfTypeSelectRemote = function (manager, success, failed, resource, orderBy, predicate, select) {
var query = EntityQuery
.from(resource)
.where(predicate)
.using(manager)
.select(select) //<------
.orderBy(orderBy);
return query.execute()
.then(success)
.fail(failed);
},
getAllOfTypeSelectLocally = function (manager, resource, orderBy, predicate, select) {
var res = null;
try {
res = EntityQuery
.from(resource)
.where(predicate)
.select(select) //<-----
.orderBy(orderBy)
.using(manager)
.executeLocally();
} catch (e) {
logger.error('resource: ' + resource + '<br>select: ' + select + '<br>orderBy:' + orderBy, 'Local query failed!');
}
return res;
};
叫这样:
var selectStr = 'User'; //<------
var p1 = new breeze.Predicate("Team.TeamName", Qop.Equals, team);
var p2 = breeze.Predicate("User.UserName", Qop.NotEquals, username);
var predicate = p1.and(p2);
//var res = dsUtils.getAllOfTypeSelectRemote(manager, success, queryFailed, 'TeamUsers', 'User.Nachname, User.Vorname', p1, select);
var res = dsUtils.getAllOfTypeSelectLocally(manager, 'TeamUsers', 'User.Nachname, User.Vorname', p1, selectStr);
远程查询返回用户实体的阵列,其是正确的,我相信。按照预期,将'selectStr'修改为像'bla'这样的无效类型会引发异常。 结果:
data.results = [{"User": {...}}, {"User": {...}}]
的本地查询只是忽略选择并返回的TeamUser 结果的数组:
res=[{ Here are the fields of TeamUsers }, { Here are the fields of TeamUsers }]
修改“selectStr”为无效类型像“BLA”抛出也不例外。 为什么选择省略,这应该是这样吗?
看着源代码,它显示Breeze没有应用'select'子句来缓存查询。我在内部提交了一份缺陷报告。同时,你可以通过在过滤结果中使用'Array.Map'来解决它吗? – Ward
我正在使用现在可以使用的远程版本。如果我找到时间,我会尝试让本地版本工作。 –
谢谢。让我知情! – Ward