Dear Roxen developers and users,
I have one question. Are there any smart way to modify variable defined
in parent scope? It doesn't matter whether through RXML or pike.
Situation is:
I have many pages which accepts form.limit and form.offset variables,
and produce list with limit/offest parameters.
Page A-1:
<html>
<body>
...
<list_a id="1" limit="&form.limit;" offset="&form.offset;" />
...
</body>
</html>
Tag definition for list_a follows like this:
<define tag="list_a">
<ul>
<emit source="sql"
query="SELECT x,y FROM table_a WHERE id=:id
LIMIT :limit OFFSET :offset"
bindings="id=id, limit=limit, offset=offset">
<li>&_.x; - &_.y;</li>
</emit>
</ul>
</define>
I must sanitize these form variables to be proper integer, and limit
must be positive, offset must be positive and smaller than 100 or so,
and, and...
Same time I also have Page B(s), which use tag list_b, accepts same
limit/offset form variables. They should be get sanitzed same way.
If it is possible, I want to do like this:
<define tag="cleanup_limit_offset" >
<sscanf format="%d" variables="Parent.limit">&Parent.limit;</sscanf>
<sscanf format="%d" variables="Parent.offset">&Parent.offset;</sscanf>
<if variable="Parent.limit < 0">
<set variable="Parent.limit" value="0" />
</if>
...same for offset...
</define>
And modify list_a definition as:
<define tag="list_a">
<clean_formvars />
<ul>
<emit source="sql" ...
...
</define>
I know this below works:
<define tag="list_a">
<clean_limit_offset limit="&_.limit;" offset="&_.offset;"
parentscope="list_a" />
<ul>
<emit source="sql" ...
...
</define>
<define tag="clean_limit_offset" >
...some sanitization coding...
<set variable="limit" from="_.limit" scope="&_.parentscope;" />
<set variable="offset" from="_.offset" scope="&_.parentscope;" />
</define>
But making variation tags later (like list_e, list_f,...), I know I will
forget to modify parentscope parameter as "list_x" for tag list_x.
So, are there any way to modify parent scope(name not known) variable
directly/indirecly anyway, or pass scope name(no hardcode) to child?
Best regards,
--
ITANI Eiichiro
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