Relations Understanding-Problem

[Emanuel]

Hi,

i'm using greenDao for the first time. I want to save some data and experienced problems with relations. Here is my szenario:

In my app I want to save some favorites I've chosen before. A favorite is an entity with some StringProperties. Besides that I have other entities. I called them "prices" and "services". A services and a prices -entity has some StringProperties on their own. 

Because a price and a service belongs to a favorite I want to set them in relation to each other. If the entities prices and services are some kind of properties of favorite, I could persist them via the favorite object like this:

...

Favorite fav = new Favorite();

fav.setSomeStringProperty("...");

fav.setPrice(prices);

fav.setService(services);

Can you tell me if this is possible?

What I already done so far is that favorite has the fields price and service but all i can do is read and not write or set the data.

I think i'm missing something or didn't totally get how to do it. Here is some code from my DaoGenerator:

Entity favourite = schema.addEntity("Favourite");

favourite.addIdProperty();

favourite.addStringProperty("addressName");

favourite.addStringProperty("addressStreet");

Entity prices = schema.addEntity("Prices");

prices.setTableName("PRICES");

prices.addIdProperty();

prices.addStringProperty("pricesResultValue");

prices.addStringProperty("pricesResultKey");

favId = prices.addLongProperty("favId").notNull().getProperty();

prices.addToOne(favourite, favId);

ToMany pricesToFavs = favourite.addToMany(prices, favId);

pricesToFavs.setName("prices");

Entity services = schema.addEntity("Services");

services.setTableName("SERVICES");

services.addIdProperty();

services.addStringProperty("servicesResultIcon");

services.addStringProperty("servicesResultValue");

favId = services.addLongProperty("favId").notNull().getProperty();

services.addToOne(favourite, favId);

ToMany servicesToFavs = favourite.addToMany(services, favId);

servicesToFavs.setName("services");

Many thanks in advance!!

Emanuel

[Emanuel]

Fixed.

1) I removed the ToOne relation of the depending entities Prices and Services. 

2) I used the wrong object to persist the entities Prices and Services. Due to the documentation I thought they would be persisted to the general daoSession as described here

List orders = customer.getOrders();
newOrder.setCustomerId(customer.getId());
daoSession.insert(newOrder);
orders.add(newOrder);

What needs to be done is to persist an entity to its own dao. What I do is something like this

Services services = new Services();

services.setSomeProperty;

services.setFavoriteId(fav.getId());

this.daoSession.getServiceDao().insert(services);    <-- here i get the serviceDao to do the insert

[Markus Junginger]

Fixed.

Glad you figured it out.

Let me add a comment to your point 2): it should not make any difference if you persist an entity using DaoDession or a concrete DAO. The session just delegates to the DAO.

Markus