Add initial support for generating seed files

[josegonzalez]

This is part one of the necessary work to add support for phinx seeds. Our next step is to add support to the migrations runners to actually apply seeds to a database.

Opening PR to continue discussion based on running code :)

Refs #19.

[HavokInspiration]

Looks like a good start to me.

While baking a seed file, maybe it would a nice feature to ask if the current table data are to be exported as records ? Or with an option ?

[bravo-kernel]

Exporting table data to re-usable records/arrays would be a godsent by itself 👍

[ionas]

. DS? Screw PHP.

[josegonzalez]

Can't do that in a class attribute. Also, all other bake tasks use slashes, and php now correctly handles them afaik.

[ionas]

I like it. It did always trouble me how to pre-populate some basic data like say admin account or genders table.

[josegonzalez]

Semi-related, https://gist.github.com/josegonzalez/3863f341ede1b6273ba3

@bravo-kernel take a look, might be... interesting :)

[bravo-kernel]

Thanks for the pointer @josegonzalez. Exporting data so it can be re-entered cake-style (e.g. column order dependent) is what I think would complete my migrations workflow:

1. Export table data before migration
2. Alter tables using migrations
3. Insert data from step 1 again

[lorenzo]

I think this is a good start, since you are an awesome writer @josegonzalez, do you mind adding a few lines in the book about using this feature?

[josegonzalez]

It's not done yet, in that there isn't a way to actually use the seed files. That still needs to be done. @HavokInspiration I think you are more familiar with futzing with phinx commands, mind taking care of that? I might have time this weekend otherwise.

[lorenzo]

Ah, I thought it was in a kind of usable state already :(

[josegonzalez]

You definitely need to read the code/comments in my PRs, otherwise we're going to have issues where I break cake core :P

[lorenzo]

@josegonzalez I forgot that seeds where something different to migrations, so I thought just having the file generated would be enough :D

[HavokInspiration]

@josegonzalez I'm not sure if I'll get the time before this weekend, but I can start looking into it.

[HavokInspiration]

I gave this a spin.
I have the shell working and seeding with the same options as migrations (source, plugin, connection and I implemented the seed option to specify the file to seed).

I still have some tuning to do to the Bake task (and maybe some cleanup). And add tests.
I had to make it closer to the migrations baking process. For instance, Seed files can not be under a namespace, so I put them in the config dir.
I'll give more details when I'll open the PR.

[josegonzalez]

Wait, we still can't put phinx files into namespaced directories?

[HavokInspiration]

Nop.
It's being discussed however : cakephp/phinx#168

[josegonzalez]

Gotcha. Welp thems the breaks.