Difference: FormattedSearch (r24 vs. r23)

TWiki Formatted Search

Inline search feature allows flexible formatting of search result

The default output format of a %SEARCH{...}% is a table consisting of topic names and topic summaries. Use the format="..." parameter to customize the search result. The format parameter typically defines a bullet or a table row containing variables, such as %SEARCH{ "food" format="| $topic | $summary |" }%. See %SEARCH{...}% for other search parameters, such as separator="".

Syntax

Three parameters can be used to customize a search result:

1. header="..." parameter

Use the header parameter to specify the header of a search result. It should correspond to the format of the format parameter. This parameter is optional.
Example: header="| *Topic:* | *Summary:* |"

Variables that can be used in the header string:

Name:Expands To:
$web Name of the web
$n or $n() New line. Use $n() if followed by alphanumeric character, e.g. write Foo$n()Bar instead of Foo$nBar
$nop or $nop() Is a "no operation". This variable gets removed; useful for nested search
$quot or \" Double quote (")
$aquot Apostrophe quote (')
$percnt Percent sign (%)
$dollar Dollar sign ($)
$lt Less than sign (<)
$gt Greater than sign (>)

2. format="..." parameter

Use the format parameter to specify the format of one search hit.
Example: format="| $topic | $summary |"

Variables that can be used in the format string:

Name:Expands To:
$web Name of the web
$topic Topic name
$topic(20) Topic name, "- " hyphenated each 20 characters
$topic(30, -<br />) Topic name, hyphenated each 30 characters with separator "-<br />"
$topic(40, ...) Topic name, shortened to 40 characters with "..." indication
$parent Name of parent topic; empty if not set
$parent(20) Name of parent topic, same hyphenation/shortening like $topic()
$text Formatted topic text. In case of a multiple="on" search, it is the line found for each search hit.
$locked LOCKED flag (if any)
$date Time stamp of last topic update, e.g. 26 Jan 2020 - 08:00
$isodate Time stamp of last topic update, e.g. 2020-01-26T08:00Z
$rev Number of last topic revision, e.g. 4
$username Login name of last topic update, e.g. jsmith
$wikiname Wiki user name of last topic update, e.g. JohnSmith
$wikiusername Wiki user name of last topic update, like Main.JohnSmith
$createdate Time stamp of topic revision 1
$createusername Login name of topic revision 1, e.g. jsmith
$createwikiname Wiki user name of topic revision 1, e.g. JohnSmith
$createwikiusername Wiki user name of topic revision 1, e.g. Main.JohnSmith
$summary Topic summary, just the plain text, all TWiki variables, formatting and line breaks removed; up to 162 characters
$summary(50) Topic summary, up to 50 characters shown
$summary(showvarnames) Topic summary, with %ALLTWIKI{...}% variables shown as ALLTWIKI{...}
$summary(noheader) $summary(expandvar) Topic summary, with leading ---+ %ALLTWIKI{...}% headers removed variables expanded
Note: The tokens can be combined, for example $summary(100, showvarnames, noheader)
$changes $summary(noheader) Summary of changes between Topic summary, with leading latest rev and previous rev ---+ headers removed
Note: The tokens can be combined, for example $summary(100, showvarnames, noheader)
$changes( $changes n )Summary of changes between latest rev and previous rev n
$formname $changes( n )The Summary name of the form attached to the topic; empty changes between latest rev and rev n if none
$formfield( $formname name )The field name value of a the form field; for example, attached to the topic; empty if none $formfield(TopicClassification) would get expanded to PublicFAQ . This applies only to topics that have a TWikiForm
$formfield(name, name 10 )Form The field value, " value of a form field; for example, - $formfield(TopicClassification) " hyphenated each 10 would get expanded to characters PublicFAQ . This applies only to topics that have a TWikiForm
$formfield(name, 20, 10 -
)
Form field value, hyphenated each 20 characters with separator " - - /> " hyphenated each 10 characters
$formfield(name, 30, ... 20, - /> )Form field value, shortened to 30 hyphenated each 20 characters with separator " ... - /> " indication
$query( $formfield( query-syntax name, 30, ... )Access topic meta data using SQL-like Form field value, shortened to 30 characters with " QuerySearch ... syntax. Example: " indication
$query(attachments.arraysize) returns the number of files attached to the current topic
$query(attachments[name~'*.gif'].size) returns an array with size of all .gif attachments, such as 848, 1425, 923
$query(parent.name) is equivalent to $parent
$pattern( $query( reg-exp query-syntax )A Access regular expression pattern to extract some text from a topic (does not search meta data; use data using SQL-like $formfield QuerySearch instead). In syntax. Example: case of a multiple="on" search, the pattern is applied to the line found in each search hit.
Specify a RegularExpression $query(attachments.arraysize) that returns covers the whole text (topic or line), which typically starts number of files attached to the current topic with .* , and must end in .*
Put text you want to keep in parenthesis, like $pattern(.*?(from $query(attachments[name~'*.gif'].size) here.*?to here).*) returns an array with size of all .gif attachments, such as 848, 1425, 923
Example: $pattern(.*?\*.*?Email\:\s*([^\n\r]+).*) $query(parent.name) extracts the e-mail is equivalent to address from a bullet of format * $parent Email: ...
• This example has non-greedy .*? patterns to scan for the first occurance of the Email bullet; use greedy .* patterns to scan for the last occurance
• Limitation: Do not use .*) inside the pattern, e.g. $pattern(.*foo(.*)bar.*) does not work, but $pattern(.*foo(.*?)bar.*) does
• Note: Make sure that the integrity of a web page is not compromised; for example, if you include an HTML table make sure to include everything including the table end tag
$count( $pattern( reg-exp )Count A of number of times a regular expression pattern appears in the to extract some text of from a topic (does not search meta data). data; Follows guidelines for use and limitations outlined above under $pattern(reg-exp) $formfield . Example: instead). In case of a $count(.*?(---[+][+][+][+]) multiple="on" .*) counts search, the number of

headers pattern is applied to the line found in a page. each search hit.
• Specify a RegularExpression that covers the whole text (topic or line), which typically starts with .* , and must end in .*
• Put text you want to keep in parenthesis, like $pattern(.*?(from here.*?to here).*)
• Example: $pattern(.*?\*.*?Email\:\s*([^\n\r]+).*) extracts the e-mail address from a bullet of format * Email: ...
• This example has non-greedy .*? patterns to scan for the first occurance of the Email bullet; use greedy .* patterns to scan for the last occurance
• Limitation: Do not use .*) inside the pattern, e.g. $pattern(.*foo(.*)bar.*) does not work, but $pattern(.*foo(.*?)bar.*) does
• Note: Make sure that the integrity of a web page is not compromised; for example, if you include an HTML table make sure to include everything including the table end tag

$ntopics $count( reg-exp )Number Count of topics found number of times a regular expression pattern appears in current web. This is the current text of a topic count, (does not the total number of topics search meta data). Follows guidelines for use and limitations outlined above under $pattern(reg-exp) . Example: $count(.*?(---[+][+][+][+]) .*) counts the number of

headers in a page.

$nhits $ntopics Number of hits if topics found in current web. This is the current topic count, not the total number of topics multiple="on" . Cumulative across all topics in current web. Identical to $ntopics unless multiple="on"
$n $nhits or $n() New line. Use Number of hits if $n() multiple="on" if followed by alphanumeric character, e.g. write . Cumulative across all topics in current web. Identical to Foo$n()Bar $ntopics instead unless of Foo$nBar multiple="on"
$nop $n or $nop() $n() Is a "no New line. Use operation". This variable gets removed; useful for nested search $n() if followed by alphanumeric character, e.g. write Foo$n()Bar instead of Foo$nBar
$quot $nop or \" $nop() Double quote ( Is a "no operation". This variable gets removed; useful for nested search " )
$aquot $quot or \" Apostrophe Double quote ( ' " )
$percnt $aquot Percent sign Apostrophe quote ( % ' )
$dollar $percnt Dollar Percent sign ( $ % )
$lt $dollar Less Dollar than sign ( < $ )
$gt $lt Greater Less than sign ( > < )
$gt Greater than sign (>)

3. footer="..." parameter

Use the footer parameter to specify the footer of a search result. It should correspond to the format of the format parameter. This parameter is optional.
Example: footer="| *Topic* | *Summary* |"

Variables that can be used in the footer string:

Name:Expands To:
$web Name of the web
$ntopics Number of topics found in current web
$nhits Number of hits if multiple="on". Cumulative across all topics in current web. Identical to $ntopics unless multiple="on"
$n or $n() New line. Use $n() if followed by alphanumeric character, e.g. write Foo$n()Bar instead of Foo$nBar
$nop or $nop() Is a "no operation". This variable gets removed; useful for nested search
$quot or \" Double quote (")
$aquot Apostrophe quote (')
$percnt Percent sign (%)
$dollar Dollar sign ($)
$lt Less than sign (<)
$gt Greater than sign (>)

Evaluation order of variables

By default, variables embedded in the format parameter of %SEARCH{}% are evaluated once before the search. This is OK for variables that do not change, such as %SCRIPTURLPATH%. Variables that should be evaluated once per search hit must be escaped. For example, to escape a conditional:
    %IF{ "..." then="..." else="..." }%
write this:
    format="$percntIF{ \"...\" then=\"...\" else=\"...\" }$percnt"

Examples

Here are some samples of formatted searches. The SearchPatternCookbook has other examples, such as creating a picklist of usernames, searching for topic children and more.

Bullet list showing topic name and summary

Write this:

%SEARCH{ "FAQ" scope="topic" nosearch="on" nototal="on" header="   * *Topic: Summary:*" format="   * [[$topic]]: $summary"  footer="   * *Topic: Summary*"  }%

To get this:

  • Topic: Summary:
  • TWikiFAQ: Frequently Asked Questions About TWiki This is a real FAQ, and also a demo of an easily implemented knowledge base solution. To see how it`s done, view the source...
  • TWikiFaqTemplate: FAQ: Answer: Back to: TWikiFAQ Contributors:
  • TextFormattingFAQ: Text Formatting FAQ This topics lists frequently asked questions on text formatting. Text formatting applies to people who edit TWiki pages in raw edit mode. TextFormattingRules...
  • Topic: Summary

Table showing form field values of topics with a form

In a web where there is a form that contains a TopicClassification field, an OperatingSystem field and an OsVersion field we could write:

| *Topic:* | *OperatingSystem:* | *OsVersion:* |
%SEARCH{ "[T]opicClassification.*?value=\"[P]ublicFAQ\"" scope="text" type="regex" nosearch="on" nototal="on" format="| [[$topic]] | $formfield(OperatingSystem) | $formfield(OsVersion) |" }%

To get this:

Topic:OperatingSystemOsVersion
IncorrectDllVersionW32PTH10DLLOsWin 95/98
WinDoze95CrashOsWin 95

Extract some text from a topic using regular expression

Write this:

%SEARCH{ "__Back to\:__ TWikiFAQ" scope="text" type="regex" nosearch="on" nototal="on" header="TWiki FAQs:" format="   * $pattern(.*?FAQ\:[\n\r]*([^\n\r]+).*) [[$topic][Answer...]]" }%

To get this:

TWiki FAQs:

  • How can I create a simple TWiki Forms based application? Answer...
  • How do I delete or rename a topic? Answer...
  • How do I delete or rename a file attachment? Answer...
  • Why does the topic revision not increase when I edit a topic? Answer...
  • TWiki is distributed under the GPL (GNU General Public License). What is GPL? Answer...
  • I've problems with the WebSearch. There is no Search Result on any inquiry. By clicking the Index topic it's the same problem. Answer...
  • What happens if two of us try to edit the same topic simultaneously? Answer...
  • I would like to install TWiki on my server. Can I get the source? Answer...
  • What does the "T" in TWiki stand for? Answer...
  • So what is this WikiWiki thing exactly? Answer...
  • Everybody can edit any page, this is scary. Doesn't that lead to chaos? Answer...

Nested Search

Search can be nested. For example, search for some topics, then form a new search for each topic found in the first search. The idea is to build the nested search string using a formatted search in the first search.

Here is an example. Let's search for all topics that contain the word "culture" (first search), and let's find out where each topic found is linked from (second search).

  • First search:
    • %SEARCH{ "culture" format="   * $topic is referenced by: (list all references)" nosearch="on" nototal="on" }%
  • Second search. For each hit we want this search:
    • %SEARCH{ "(topic found in first search)" format="$topic" nosearch="on" nototal="on" separator=", " }%
  • Now let's nest the two. We need to escape the second search, e.g. the first search will build a valid second search string. Note that we escape the second search so that it does not get evaluated prematurely by the first search:
    • Use $percnt to escape the leading percent of the second search
    • Use \" to escape the double quotes
    • Use $dollar to escape the $ of $topic
    • Use $nop to escape the }% sequence

Write this:

%SEARCH{ "culture" format="   * $topic is referenced by:$n      * $percntSEARCH{ \"$topic\" format=\"$dollartopic\" nosearch=\"on\" nototal=\"on\" separator=\", \" }$nop%" nosearch="on" nototal="on" }%

To get this:

Note: Nested search can be slow, especially if you nest more then 3 times. Nesting is limited to 16 levels. For each new nesting level you need to "escape the escapes", e.g. write $dollarpercntSEARCH{ for level three, $dollardollarpercntSEARCH{ for level four, etc.

Most recently changed pages

Write this:

%SEARCH{ "\.*" scope="topic" type="regex" nosearch="on" nototal="on" order="modified" reverse="on"  format="| [[$topic]] | $wikiusername  | $date |" limit="7" }%

To get this:

TWikiNetSkinPluginTWikiAdminUser 2015-06-26 - 17:30
WeatherPluginTWikiAdminUser 2015-06-17 - 19:57
VotePluginTWikiAdminUser 2015-06-17 - 19:57
VarVOTETWikiAdminUser 2015-06-17 - 19:57
RatingContribTWikiAdminUser 2015-06-17 - 19:57
VarCachePluginTWikiAdminUser 2015-06-17 - 19:57
VarCachePluginTestTWikiAdminUser 2015-06-17 - 19:57

Search with conditional output

A regular expression search is flexible, but there are limitations. For example, you cannot show all topics that are up to exactly one week old, or create a report that shows all records with invalid form fields or fields within a certain range, etc. You need some additional logic to format output based on a condition:

  1. Specify a search which returns more hits then you need
  2. For each search hit apply a spreadsheet formula to determine if the hit is needed
  3. If needed, format and output the result
  4. Else supress the search hit

This requires the TWiki:Plugins.SpreadSheetPlugin . The following example shows all topics in the Main web that are up to exactly one week old. have been updated in the last 7 days.

Write this:

%CALC{$SET(weekold, $TIMEADD($TIME(), -7, day))}%
%SEARCH{ "." scope="topic" type="regex" nosearch="on" nototal="on" web="Main" nonoise="on" order="modified" reverse="on" format="$percntCALC{$IF($TIME($date) < $GET(weekold), , | [[$topic]] [[$web.$topic][$topic]] | $wikiusername | $date | $rev |)}$percnt" limit="100" }%

  • The first line sets the weekold variable to the serialized date of exactly one week ago
  • The SEARCH has a deferred CALC. The $percnt makes sure that the CALC gets executed once for each search hit
  • The CALC compares the date of the topic with the weekold date
  • If topic is older, a <nop> is returned, which gets removed at the end of the TWiki rendering process
  • Otherwise, the search hit is formatted and returned

To get this:

The condition can be anything you like. To restrict search based on a date range it is easier to use the date="" parameter as shown in the next example.

Restrict search based on a date range

A search can be restricted based on a date range. The following example is identical to the previous one, showing all topics in the Main web that have been updated in the last 7 days.

Write this:

%SEARCH{ "." scope="topic" type="regex" web="Main" nonoise="on" order="modified" reverse="on" format="| [[$web.$topic][$topic]] | $wikiusername | $date | $rev |" limit="100" date="P1w/$today" }%

To get this:

Embedding search forms to return a formatted result

Use an HTML form and an embedded formatted search on the same topic. You can link them together with an %URLPARAM{"..."}% variable. Example:

Write this:

<form action="%SCRIPTURLPATH{"view"}%/%WEB%/%TOPIC%">
Find Topics: 
<input type="text" name="q" size="32" value="%URLPARAM{"q" encode="entity"}%" />&nbsp;<input type="submit" class="twikiSubmit" value="Search" />
</form>
Result:
%SEARCH{ search="%URLPARAM{"q" encode="quote"}%" type="keyword" format="   * $web.$topic: %BR% $summary" nosearch="on" }%

To get this:

Find Topics:  

Result:

Related Topics: UserDocumentationCategory, SearchHelp, VarSEARCH, SearchPatternCookbook, RegularExpression, QuerySearch

-- Contributors: TWiki:Main.PeterThoeny, TWiki:Main.CrawfordCurrie, TWiki:Main.SopanShewale

 
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