Accessing minus parameter in templates

Archived from the Xataface Users forum.

SilverCorvus — Tue Feb 08, 2011 4:23 am

I stumbled over the problem, that I had to access some of the minus parameters (e.g. -action, -table) in templates, but this wasn’t possible the normal way:

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{if $ENV.REQUEST.-table == ...} -- doesn't work.

You can’t access it, when the key-value of the array (because it’s in fact $ENV[‘REQUEST’][‘-table’]) doesn’t meet the php variable naming conventions. So minus, space, dot ect. doesn’t work.

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{if $ENV.REQUEST.`with space` == ...} {if $ENV.REQUEST."min-us" == ...} {if $ENV.REQUEST.'with.dot' == ...}

All these scenarios of “bad keys” and tried solutions via escaping don’t work.

There are two possible ways:

  • Rewrite the array: Probably not so good for Xataface
  • A workaround:
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{assign var=_table value="-table"} {if $ENV.REQUEST.$_table == ...)

In fact it is a Smarty problem, but because of the naming convention of Xataface I thought posting this could help others who stumble over this problem too.

shannah — Tue Feb 08, 2011 12:59 pm

Yes. This is an annoyance, but there are a few solutions in Xataface.

  1. Some of the common query parameters have been added directly to the $ENV variable:
    • $ENV.action
    • $ENV.table
    • $ENV.limit
    • $ENV.start
    • $ENV.mode
    • $ENV.search
  2. The Dataface_Application class which is accessible from the $ENV variable has a getQueryParam method that allows you to get any query parameter. This takes input parameters without the prefixed dash. e.g. to get the value of $_GET[‘-action’], you would call $ENV.APPLICATION_OBJECT->getQueryParam(‘action’)

-Steve

SilverCorvus — Tue Feb 08, 2011 3:19 pm

But these directly added parameters are from the query, as you said. But in my special case I would have needed from the request - look at the array to compare:

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[REQUEST] => Array         (             [-table] => char         ) [QUERY] => Array         (             [-table] => char             [-action] => list             [--original_action] => list             [-cursor] => 0             [-skip] => 0             [-limit] => 30             [-mode] => list         )     [action] => list     [table] => char

The query/directly added parameters contain also the default value, not the pure request ones.
But there is also your shown way number 2 to accomplish it, if this very special case occurs.