If, Then, Else Conditionals

Summary:

Do such conditionals as IF this DO THAT, and OTHERWISE DO THIS exist within Wikidot.com?

If, Then, Else Conditionals

James Kanjo 08 May 2008 07:22

Do such conditionals as IF this DO THAT, and OTHERWISE DO THIS exist within Wikidot.com?

What I'm essentially trying to do is create a template. I read the How To Create Templates page, and looked at the http://siliconcity.wikidot.com/HeroBox page.

Apparently, I could use the [include templatename] feature with a template as such (as they have done on the http://siliconcity.wikidot.com/template:herocharacter page. However, I would prefer that instead of setting unused variables to "Not mentioned", I think it would be ideal to have an If command within the template I'm including.

Something like this: [Include template |IF {name} exists, display {name} ELSE don't display anything]

Does anybody know if something like this is possible?

Cheers ~ James Kanjo

---

λ James Kanjo
_{Blog | Wikidot Expert | λ and Proud
Web Developer | HTML | CSS | JavaScript}

Re: If, Then, Else Conditionals

ErichSteinboeck 08 May 2008 08:40

With the ideas described in Include Part Of A Page Only (Tricky Version) you should be able set up an include template that will

• show an attribute if “attribute=some-attribute-text” is specified, or
• does not display anything if “attributeSpecified=@@” is specified.

Something like:

[[include Template
|name=Name
|playerSpecified=@@
|originSpecified=@@
|level=3
.
.
|footnotesSpecified=@@
]]

Re: If, Then, Else Conditionals

James Kanjo 08 May 2008 09:55

Thankyou for that, but it isn't exactly helpful to my situation. You see, If I do that, then the heading would still display. Imagine the template looked like this:

**Name:** {$name}
**Age:** {$age}
**Sex:** {$sex}

If I included that on a page with code like this:

[[include Template
|name=James Kanjo
|age=@@
|sex=@@
]]

Then it would display the following:

Name: James Kanjo
Age:
Sex:

But if the values equal nothing, I don't want the text for that value to display, so I want this to display instead if the same values are used:

Name: James Kanjo

Does that make sense? So the code on the template page could be something like this:

If {$name} Then Display="**Name:** {$name}"|Else Display=""
If {$age} Then Display="**Age:** {$age}"|Else Display=""
If {$sex} Then Display="**Sex:** {$sex}"|Else Display=""

So if the values exist, then display the preceding text. Now, is that a possibility?

By the way, your "include part of a page on another page" worked perfectly for me! Thankyou for helping me back then - especially when everybody else thought it was impossible. I said it back then and I will say it again: you showed them!

Cheers ~ James Kanjo

---

λ James Kanjo
_{Blog | Wikidot Expert | λ and Proud
Web Developer | HTML | CSS | JavaScript}

Re: If, Then, Else Conditionals

Helmuti_pdorf 08 May 2008 10:38

My proposal would be:
1. the included Template without any labels:

{$name}
{$age}
{$sex}

2. the individual page including the template - put the labels in the variables!

[[include incl-Template
|name=James Kanjo
|age=@@
|sex=@@
]]

[[include incl-Template
|name=**Name:** James Kanjo
|age=@@
|sex=@@
]]

Gives:

James Kanjo
Name: James Kanjo

and nothing else…

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Re: If, Then, Else Conditionals

ErichSteinboeck 08 May 2008 12:54

if the values equal nothing, I don't want the text for that value to display

I understand what you mean. As Wikidot does not support an IF/THEN/ELSE constructs, I suggested to use the idea that is presented in [[Part Of A Page Only (Tricky Version)].

So, your template should e. g. look like:

[[table]]
[[row]]
[[cell]][!--{$nameSpecified}--][[[@@|]]]**Name:**[[/cell]]
[[cell]]{$name}[[/cell]]
[[/row]]
[[row]]
[[cell]][!-- --][!--{$playerSpecified}--][[[@@|]]]**Player:**[[/cell]]
[[cell]]{$player}[[/cell]]
[[/row]]
[[row]]
[[cell]][!-- --][!--{$originSpecified}--][[[@@|]]]**Origin:**[[/cell]]
[[cell]]{$origin}[[/cell]]
[[/row]]
[[row]]
[[cell]][!-- --][!--{$levelSpecified}--][[[@@|]]]**Level:**[[/cell]]
[[cell]]{$level}[[/cell]]
[[/row]]
[[row]]
[[cell]][!-- --][!--{$footnotesSpecified}--][[[@@|]]]**Footnotes:**[[/cell]]
[[cell]]{$footnotes}[!-- --][[/cell]]
[[/row]]
[[/table]]

I know, it's not very readable, and you have to carefully place the “markers” inside the table (it should be more straightforward, if you do not have to use a table.)

And your include should look like:

[[include Template
|name=Name
|playerSpecified=@@
|originSpecified=@@
|level=3
|footnotesSpecified=@@
]]

Then the result would be:

Name:	Name
Level:	3

Re: If, Then, Else Conditionals

James Kanjo 09 May 2008 12:36

ErichSteinboeck, you bloody beauty! You've done it again!

I made a change, however; I found the same results by removing the word "Specified" from everywhere, which is more convenient than having a separate variable to say if it doesn't exist. Unless you have a reason to stop me from doing this (such as, if I get rid of the word "Specified" I will cause problems later).

It seems your clever technique is a double edged sword!

Cheers ~ James Kanjo

---

λ James Kanjo
_{Blog | Wikidot Expert | λ and Proud
Web Developer | HTML | CSS | JavaScript}

Re: If, Then, Else Conditionals

ErichSteinboeck 09 May 2008 13:17

same results by removing the word "Specified" from everywhere

Brilliant idea! I'll adapt the Howto to reflect this!

Please also see my Community Howto Set Up An Infobox that shows how to display only attributes with a value — all other values are not shown.

Depending on your setup, this may be better because you can later change the include template without breaking all existing includes. In your current setup you'd have to adapt all existing includes.

Re: If, Then, Else Conditionals

ChuckColeman 30 Aug 2008 19:32

What I want to do is to use if, then logic within ListPages.

The idea is that ListPages will display all the pages with month and day of birth if date of death does not exist. In effect, I'm trying to create a calendar that won't display birthdays of dead people.

Re: If, Then, Else Conditionals

David Marseilles 30 Aug 2008 19:41

[[module ListPage category="birthdays" tags="-deceased"]]
<custom format>
[[/module]]

When filling in a date of death, add the tag "deceased" (or whatever tag suits your purposes).