SID-00473: How can I determine if a given attachment exists or not?

Status:	Answered	TWiki version:	4.0.3	Perl version:	5.x
Category:	CategoryAttachments	Server OS:	RedHat Linux	Last update:	16 years ago

It is quite straight forward to see if a given topic exists.

 %IF{"istopic 'topicname'" then="present" else "not present"}%

However if topicname is changed for topicname?filename=myfile then this doesn't work as it always returns true (yes the topic exists) altering topicname to be fullurltotopic?filename=myfile does not work either.

How can I programmatically detect whether an attachment exists or not.

BTW I'm not looking for a %SEARCH solution as I'm trying to create an in-line URL link to either link to the appropriate file or to enable a pop-up warning functionality.

-- JeremyWolstenCroft - 2009-08-11

Discussion and Answer

I think you may need a %SEARCH% solution for this: QuerySearch can get you the attachment information you need.

Then the SpreadSheetPlugin can be used to evaluate the search result, and generate in-line URL or tag with the javascript pop-up. See, "Can I use CALC in a formatted search?" in the plugin's documentation.

-- SeanCMorgan - 2009-08-13

Seems to be answered.

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-- PeterThoeny - 2009-10-02

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