jaguar_dart/jaguar

Jaguar discussion

Ravi Teja Gudapati

@tejainece

in your case, with current jaguar, i would do

articoli.codiciIVA = await articoliBean.findByUser(articoli.id);
articoli.codiciIVA.percentuale;

Massimo Caroccia

@carmas123

oh yes this is really good

but not really functional

Ravi Teja Gudapati

@tejainece

yes i agree

What do you mean functional?

Massimo Caroccia

@carmas123

because I need call an await method to read the values

Ravi Teja Gudapati

@tejainece

Massimo Caroccia

@carmas123

the parent values are not available when the model class is created

Ravi Teja Gudapati

@tejainece

I will implement preloading parents for child model

Massimo Caroccia

@carmas123

this is a really good new :)

Kevin Segaud

@Kleak

asyncMap can help you to transform it no ?

Ravi Teja Gudapati

@tejainece

yes

Massimo Caroccia

@carmas123

news

Ravi Teja Gudapati

@tejainece

yes one could do with async map and then for lists and ones

Massimo Caroccia

@carmas123

yes this is true the best way in my opinion is to have in child class the reference with parent class that lazy load the parent class

Ravi Teja Gudapati

@tejainece

@carmas123 PRs are welcome. i will implement this. It will take some time

basically you will be able to do

Kevin Segaud

@Kleak

  Observable.fromFuture(getArticoli).asyncMap((articoli) async {
    articoli.codiciIVA = await articoliBean.findByUser(articoli.id);
    return articoli;
  }).listen((value) => print(value));

Ravi Teja Gudapati

@tejainece

or something like that

Massimo Caroccia

@carmas123

yes

Ravi Teja Gudapati

@tejainece

class CodiciIVA extends BaseModel {
  @PrimaryKey()
  String codice = "";
  String descrizione = "";
  num percentuale = 0;
  int noImponibile = 0;

  @HasOne(ArticoliBean)
  Articoli articoli;
}


class Articoli extends BaseModel {
  @PrimaryKey()
  String codice = "";
  @BelongsTo(CodiciIVABean, refCol: 'codice')
  String codiceIVAId;

  @Parent()
  CodiciIVA codiciIVA;
}

Massimo Caroccia

@carmas123

kevin you solution is good .... but when we work with an ORM we must have the best way to solve the problem and not an adaptive solution . ;)

Ravi Teja Gudapati

@tejainece

Thanks for the inputs @carmas123.

Massimo Caroccia

@carmas123

however for now I can use your solution

you are welcome

Revi...

sorry I don't know how the annotation generation work in dart...but the real best way is this:

class CodiciIVA extends BaseModel {
@PrimaryKey()
String codice = "";
String descrizione = "";
num percentuale = 0;
int noImponibile = 0;
}

class Articoli extends BaseModel {
@PrimaryKey()
String codice = "";

@Parent(refCol: "codice")
CodiciIVA codiciIVA;
}

this is a very good result

Ravi Teja Gudapati

@tejainece

You have to specify the foreign key.

Yes. I agree with your solution.

Only thing missing is foreign key in articoli

Massimo Caroccia

@carmas123

yes the foreignkey is needed only if we want to generate the table automatically

otherwise not

if we start the app with a pre-build database we dont need to specify the foreign key

or not?

Ravi Teja Gudapati

@tejainece

Jaguar assumes table creation

Massimo Caroccia

@carmas123

yes this is true

but it should not be mandatory

Ravi we can this preload into fromMap method

Ravi Teja Gudapati

@tejainece

What do you mean?

When you execute find* method with preload set to true

The codicilVA field will automatically preloaded.

Massimo Caroccia

@carmas123

I think that the best way is to have an async fromMap method

that can load the parent data

with an await execution

model.codiceIVA = adapter.parseValue(map['codiceIVA']);

model.codiceIVA = await CodiciIVA.findByKey(adapter.parseValue(map['codiceIVA']));

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