Reference

Shows how you can use iter to refer to any arbitrary row of any arbitrary column of any arbitrary model, via self.datagen.ModelName().field_name(iter).

Model: Users

Create a file named users.dg:

users.dg

model users {
  fields {
    id() int
    name() string
  }

  gens {
    func id() {
      return iter + 1
    }

    func name() {
      return Name()
    }
  }
}

Model: Orders

Create a file named orders.dg in the same directory:

orders.dg

model orders {
  fields {
    user_id() int
    user_name() string
    order_count() int
  }

  gens {
    func user_id() {
      return self.datagen.users().id(iter)
    }

    func user_name() {
      return self.datagen.users().name(iter)
    }

    func order_count() {
      return IntBetween(0, 10)
    }
  }
}

How to Run

With both .dg files in the current directory:

$ datagenc gen . -f csv -n 3

Output

$ cat orders.csv

user_id,user_name,order_count
1,Jordy Bashirian,1
2,Luisa Adams,4
3,Willow Marks,10

$ cat users.csv

id,name
1,Jordy Bashirian
2,Luisa Adams
3,Willow Marks