static LCRelation <LCObject> DecodeRelation(IDictionary dict)
{
LCRelation <LCObject> relation = new LCRelation <LCObject>();
relation.TargetClass = dict["className"].ToString();
return(relation);
}
public object Apply(object oldValue, string key)
{
LCRelation <LCObject> relation = new LCRelation <LCObject>();
relation.TargetClass = valueList[0].ClassName;
return(relation);
}
static object EncodeRelation(LCRelation <LCObject> relation)
{
return(new Dictionary <string, object> {
{ "__type", "Relation" },
{ "className", relation.TargetClass }
});
}
public async Task AddAndRemove()
{
LCObject parent = new LCObject("Parent");
LCObject c1 = new LCObject("Child");
parent.AddRelation("children", c1);
LCObject c2 = new LCObject("Child");
parent.AddRelation("children", c2);
await parent.Save();
LCRelation <LCObject> relation = parent["children"] as LCRelation <LCObject>;
LCQuery <LCObject> query = relation.Query;
int count = await query.Count();
TestContext.WriteLine($"count: {count}");
Assert.AreEqual(count, 2);
parent.RemoveRelation("children", c2);
await parent.Save();
int count2 = await query.Count();
TestContext.WriteLine($"count: {count2}");
Assert.AreEqual(count2, 1);
}
public async Task Query()
{
LCQuery <LCObject> query = new LCQuery <LCObject>("Parent");
LCObject parent = await query.Get("5e13112021b47e0070ed0922");
LCRelation <LCObject> relation = parent["children"] as LCRelation <LCObject>;
TestContext.WriteLine(relation.Key);
TestContext.WriteLine(relation.Parent);
TestContext.WriteLine(relation.TargetClass);
Assert.NotNull(relation.Key);
Assert.NotNull(relation.Parent);
Assert.NotNull(relation.TargetClass);
LCQuery <LCObject> relationQuery = relation.Query;
List <LCObject> list = await relationQuery.Find();
list.ForEach(item => {
TestContext.WriteLine(item.ObjectId);
Assert.NotNull(item.ObjectId);
});
}
public async Task Query()
{
LCQuery <LCObject> query = new LCQuery <LCObject>("Parent");
LCObject queryParent = await query.Get(parent.ObjectId);
LCRelation <LCObject> relation = queryParent["children"] as LCRelation <LCObject>;
TestContext.WriteLine(relation.Key);
TestContext.WriteLine(relation.Parent);
TestContext.WriteLine(relation.TargetClass);
Assert.NotNull(relation.Key);
Assert.NotNull(relation.Parent);
Assert.NotNull(relation.TargetClass);
LCQuery <LCObject> relationQuery = relation.Query;
ReadOnlyCollection <LCObject> results = await relationQuery.Find();
foreach (LCObject item in results)
{
TestContext.WriteLine(item.ObjectId);
Assert.NotNull(item.ObjectId);
}
}