One-To-Many relationship in ORMLite Android

Question

How do I implement one-many relationship in ORMLite Android?

please find the example

public class A {
 private String name;
    @DatabaseField (foreign =         


        

Answer 1

i was facing the same problem. My json was like:

{
   "parent":{
            "name":"ABC",
            "children":[
                          {"childName":"1"},
                          {"childName":"2"},
                          {"childName":"3"}
                       ]
             }
}

i resolved the issue like this:

Parent parent = new Parent();
parent.setName("ABC");

while(get children one by one from json data)
{
    childrenArray.add(new Child(its Name));
}

parentDAO.create(parent);

for(Child child : childrenArray)
{
    child.setParent(parent);
    childDAO.create(child);
}

Answer 2

Now i create dao of b, since b has all the data. But the table B has only created with data, A is never created. Kindly could some one help?

Right. You need to create the A items using:

for (A a : b.aees) {
   aDao.create(a);
}

ORMLite does not automatically create those for you.

You might take a look a the source code of the foreign-collection example program.

Answer 3

You have to override the DAO of the B class, so when an object B is created or updated, the objects in the collection to be also updated.

Take a look at this question: Collections in ORMLite.