Custom provider not recognized in expression about datafaker HOT 10 CLOSED

Shouldn’t that be lower s and no trailing space?

He's passing an argument to the next method.

from datafaker.

EmployeeId','#{SequenceNumber.next ‘

Shouldn’t that be lower s and no trailing space?

from datafaker.

🤷‍♂️ I could be totally wrong, I haven’t used this part of the lib yet.

from datafaker.

Hi @ako , I think you're using the wrong faker. In your example, you are using Faker, but you should register the custom Provider at your own Faker. If you then do:

        BugFaker faker = new BugFaker();
        String data = faker.expression("#{csv ';','\"','true','10','EmployeeId','#{Insect.nextInsectName}','Firstname','#{Name.first_name}','Lastname','#{Name.last_name}'}");
        System.out.println(data);

This seems to work. You can find the code I've used to reproduce it here:

https://github.com/datafaker-net/datafaker/tree/custom_csv_provider/src/test/java/net/datafaker/providers/base/bug
(sorry, it's a bit sloppy, but I hope it's clear enough)

This is mostly based on the documentation here:
https://www.datafaker.net/documentation/custom-providers/

If the above works for you, and you're willing to make the documentation more clear, that would be very appreciated!

from datafaker.

@ako
regarding

Goal is to enable my users to generate fake csv files with 100s of records for import into database tables using the expressions, so no need to do custom java coding for csv generation. The tables expect unique id values to identify the records.

have you looked at https://github.com/datafaker-net/datafaker-gen which could do what you've described without coding (only conf files)

from datafaker.

@bodiam Thanks, your suggestion to instantiate the sequence number Faker works, but i wonder how this is supposed to work if you have multiple custom providers?

from datafaker.

in case of multiple custom provider you can register all under custom faker
e.g.

public class BugFaker extends Faker {
    public BugProvider insect() {
        return getProvider(BugProvider.class, BugProvider::new, this);
    }
}

there will be more than just one insect method.

from datafaker.

how this is supposed to work if you have multiple custom providers?

The BugFaker is the entry point for all the custom generations. It should be called MyCompanyCustomFaker or so, where you can register a provider for Insects, Sequence Numbers, Tire sizes, etc, and in your code, instead of using Faker, you use your own subclass everywhere.

from datafaker.

#869
this should simplify current approach

from datafaker.

Hi @ako , I assume this issue is addressed, but feel free to reopen if it's not.

from datafaker.