Fix enum-typed MySQL feilds

[deadtrickster]

Mariaex returns strings for fields defined as enum(...)

Unfortunately I still unable to reflect this in tests since I don't know how to create migration with enum field type. Asked in #elixir-lang (IRC, Slack).

[gjaldon]

@deadtrickster it returns as string prolly because you set the column as string instead of integer?

[deadtrickster]

Well, ENUM values are always strings, aren't they?

Excerpt from the manual (http://dev.mysql.com/doc/refman/5.7/en/enum.html):

CREATE TABLE shirts (
    name VARCHAR(40),
    size ENUM('x-small', 'small', 'medium', 'large', 'x-large')
);

[gjaldon]

@deadtrickster EctoEnum doesn't currently support MySQL Enum types but it does for Postgres. Feel free to contribute that though if you want. I plan to work on it but not anytime soon. For now, you'll need to use integer columns.

[gjaldon]

Closing this and created an issue #24

[deadtrickster]

Feel free to contribute

Could you please tell me what's wrong with this PR?

[gjaldon]

@deadtrickster we currently do not support strings in EctoEnum and supporting it would require a bit more code than that. For example, here's a pending PR that aims to support string-backed enums https://github.com/gjaldon/ecto_enum/pull/9/files

[deadtrickster]

Thank you for the reply.

Yeah my "fix" is pretty simple and I'm glad it works for me. PR you linked does a little bit more indeed. Like String.to_atom 😱.