database-query data processor 

New in version 12.1

One can use the alias database-query instead of the fully-qualified class name \TYPO3\CMS\Frontend\DataProcessing\DatabaseQueryProcessor .

The \TYPO3\CMS\Frontend\DataProcessing\DatabaseQueryProcessor , alias database-query, fetches records from the database, using standard TypoScript select semantics. The result is then passed to the FLUIDTEMPLATE as an array.

This way a FLUIDTEMPLATE cObject can iterate over the array of records.

Table of contents

Options: 

Name Type Default
if
 if condition ''
table
 string / stdWrap ''
as
 string / stdWrap 'records'
dataProcessing
 array of Data processors []

if

if
Type
if condition
Required
false
Default
''

Only if the condition is met the data processor is executed.

table

table
Type
string / stdWrap
Required
true
Default
''

Name of the table from which the records should be fetched.

as

as
Type
string / stdWrap
Required
false
Default
'records'

The variable's name to be used in the Fluid template.

dataProcessing

dataProcessing
Type
array of Data processors
Required
false
Default
[]

Array of data processors to be applied to all fetched records.

Example: Display haiku records 

Please see also About the examples.

TypoScript

We define the dataProcessing property to use the DatabaseQueryProcessor:

EXT:examples/Configuration/TypoScript/DataProcessors/Processors/DatabaseQueryProcessor.typoscript 
tt_content {
    examples_dataprocdb =< lib.contentElement
    examples_dataprocdb {
        templateName = DataProcDb
        # Before TYPO3 v12.1 you have to specify the fully-qualified class name of the processor
        # dataProcessing.10 = TYPO3\CMS\Frontend\DataProcessing\DatabaseQueryProcessor
        # Since TYPO3 v12.1 one can also use the available alias
        dataProcessing.10 = database-query
        dataProcessing.10 {
            if.isTrue.field = pages
            table = tx_examples_haiku
            orderBy = title
            pidInList.field = pages
            as = myHaikus
            // recursively process the images in the records with the FilesProcessor
            dataProcessing {
                10 = TYPO3\CMS\Frontend\DataProcessing\FilesProcessor
                10 {
                    references.fieldName = image
                }
            }
        }
    }
}
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The Fluid template

In the Fluid template then iterate over the records. As we used the recursive data processor files data processor on the image records, we can also output the images.

EXT:examples/Resources/Private/Templates/ContentElements/DataProcDb.html 
<html data-namespace-typo3-fluid="true" xmlns:f="http://typo3.org/ns/TYPO3/CMS/Fluid/ViewHelpers">
   <h2>Data in variable myHaikus</h2>
   <f:debug inline="true">{myHaikus}</f:debug>

   <h2>Output</h2>
   <div class="row">
      <f:for each="{myHaikus}" as="haiku">
         <div class="col-12 col-md-3">
            <div class="card" style="backgorund-color: {haiku.color};">
               <f:if condition="{haiku.files.0}">
                  <f:image image="{haiku.files.0}" class="card-img-top" height="300"/>
               </f:if>
               <div class="card-body">
                  <h5 class="card-title">{haiku.data.title}</h5>
                  <div class="card-text"><f:format.html>{haiku.data.poem}</f:format.html></div>
               </div>
            </div>
         </div>
      </f:for>
   </div>

</html>
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Output

Each entry of the records array contains the data of the table in data and the data of the images in files.

Haiku record data dump and output

Haiku record data dump and output