Limit index names to 63 characters to facilitate changing databases

[iox]

Postgresql: 63
Mysql: 64
Sqlite: 64

When a user goes from sqlite or mysql to postgresql, they might face weird errors. Tim proposed limiting all index to a maximum of 63 characters, and I think it's a great idea.

https://groups.google.com/forum/#!topic/hobousers/d7y2LydE1y8

[bryanlarsen]

Oracle has some sort of silly limit. 32, IIRC. Anybody using rails/hobo on Oracle pretty much has to specify all of their index names manually.

[enwood]

Thanks, Bryan.

I guess what's ultimately missing is the ability to override or
intervene/suggest a Hobo-generated index name for the migration generator.

T

On Mon, Jan 27, 2014 at 12:23 PM, Bryan Larsen notifications@github.comwrote:

Oracle has some sort of silly limit. 32, IIRC. Anybody using rails/hobo on
Oracle pretty much has to specify all of their index names manually.

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[enwood]

Whoops, yes, I forgot you can do this:

belongs_to :other_related_instrument, :class_name => "Instrument",
:index => "my_not_so_long_index_name"

That'll teach me to use really verbose class names.

T

On Mon, Jan 27, 2014 at 1:14 PM, Tim Griffin tech@enwood.ca wrote:

Thanks, Bryan.

I guess what's ultimately missing is the ability to override or
intervene/suggest a Hobo-generated index name for the migration generator.

T

On Mon, Jan 27, 2014 at 12:23 PM, Bryan Larsen notifications@github.comwrote:

Oracle has some sort of silly limit. 32, IIRC. Anybody using rails/hobo
on Oracle pretty much has to specify all of their index names manually.

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Reply to this email directly or view it on GitHubhttps://github.com//issues/65#issuecomment-33398328
.

[iox]

Mmm, I didn't know that about Oracle, and I had not renamed any index :P. What do you think if we close this issue and leave Hobo as it is?

[enwood]

Yes, I admit, it's an obscure scenario unless you like using long,
description model names like I do AND you happen to want to switch
databases. It was an easy fix, and one I could have avoided had I not
relied on Hobo's automatic index naming, and used the :index => parameter
on my belongs_to statements.

T

On Tue, Jan 28, 2014 at 12:46 AM, Ignacio Huerta
notifications@github.comwrote:

Mmm, I didn't know that about Oracle, and I had not renamed any index :P.
What do you think if we close this issue and leave Hobo as it is?

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