Calls

The calls section passes initialization arguments to field wrappers. Each line is a function call where the function name matches a field name; its arguments become parameters available to your generator implementation.

Model

Create a file named session.dg:

session.dg

model session {
  fields {
    created_by() string
    created_at(start string, end string) string
  }

  gens {
    func created_by() {
      return "admin"
    }

    func created_at(start string, end string) {
      return DateBetweenStr(start, end)
    }
  }

  calls {
    created_at("2023-01-01 00:00:00", "2023-12-31 23:59:59")
  }
}

Usage Highlights

• Arguments in calls { ... } must be valid Go expressions.
• The generated wrappers forward those arguments to gens functions.

How to Run

$ datagenc gen . -f csv -n 3

Output

$ cat session.csv

created_by,created_at
admin,2023-11-24 18:42:13
admin,2023-09-09 16:09:14
admin,2023-11-13 06:20:23