Hi Paul,
These are very good questions :)
El 12-08-2015 a las 07:02, Paul Howson escribió:
> Hi Ignacio and others,
>
> I'm a bit confused about how the Dryml <extend> tag works. The
> documentation is rather brief.
>
> This has arisen in trying to understand what's going on with Hobo Bootstrap.
>
> Hobo Bootstrap /extends/ the <index-page> tag to replace the default
> card listing with a table, and to re-locate the "New" button, etc.
>
> The questions which have arisen after grappling with this are:
>
> * Extend seems to be a bit like aliasing a method in Ruby and
> replacing it with a new definition which calls the old method
> definition. When there are polymorphic page tags (e.g. <index-page
> for…>), what exactly is the sequence of overriding?
>From what I understand, this would be the order of code execution.
- 1. hobo_rapid (index-page is first defined as polymorphic)
- 2. pages.dryml (automatically generated file in app/views/taglibs).
Different index-pages are created depending on the models
- 3. hobo_bootstrap extends it
> * Can you chain a series of extends? i.e. if a tag is already extended
> (e.g. the <index-page> tag extended by Hobo Bootstrap) can you add
> another extend? I had trouble getting this to work. What determines
> the order in which a series of extends are applied?
I'm not 100% sure, but I believe you can extend again. If it doesn't
work for you, can you share some code? I'd love to play with it.
> * If a tag has been extended (e.g. <index-page> by Hobo Bootstrap) and
> you don't like what the extension to the original tag does, can you
> "undo" or neutralise an extended tag to get back to the original
> un-extended tag?
Nope, I don't think this is possible :S.
> * If you can chain extends and there is a series of them (it gets
> complicated!) can you somehow "reach back" to an earlier version of
> the tag in the sequence.
I don't think Dryml keeps in memory all the versions.
>
> The Hobo Bootstrap example is pertinent because the Bootstrap extensions
> are in a gem and it's not easy to modify them (the mods would get
> overwritten when the gem is updated), so there needs to be a way of
> selectively undoing the Bootstrap extensions. The simplest thing would
> be to just disable the Hobo Bootstrap extension of the <index-page> tag,
> but I can't see a way to do that without modifying the gem.
Having your own gem/template should not be too hard. You can download
the hobo bootstrap gem to a local directory (for example in
vendor/gems), edit it, and then change your Gemfile like this:
gem 'hobo_boostrap', path: 'vendor/gems/hobo_bootstrap'
Alternatively, you could "override" the hobo_bootstrap changes by
creating your own tag. I would start with the generated code in
pages.dryml, and then edit it like this:
front_site.dryml
----------------
<def tag="my-index-page">
<page merge title="#{ht 'model.index.title',
:default=>[model.model_name.human(:count=>100)] }">
<body: class="index-page model" param/>
<content-header: param>
Hello
</content-header:>
<content-body: param>
World
</content-body:>
</page>
</def>
app/views/models/index.dryml
----------------------------
<my-index-page/>
Warm regards,
Ignacio
>
> Thanks, Paul Howson
>
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