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Blogs / Jérôme Vieilledent / All you want to know about datatype development

All you want to know about datatype development

Sunday 03 October 2010 5:37:49 am

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By : Jérôme Vieilledent

If you needed once to develop a custom datatype in eZ Publish, you must know what pain it can be...

No official developer documentation is available and eZDataType class which must be overridden by your custom datatype really lacks of API doc (doxygen, phpdoc).

Searching the community portal a bit, you'll find a nice tutorial by Thomas Koch. This tutorial can be a good kickstart but it remains a bit complicated. Moreover, it doesn't cover all features offered by eZ Publish datatypes.

So, as I also needed to develop a new custom datatype for my Amazon extension, jvAmazonAdvertising, I decided to dissect this not-so-well-known datatype functionnality in order to write a new tutorial : Datatypes development : The definitive guide.

Stay tuned for updates ! ;-)

eZ debug

Timing: Jan 30 2025 15:42:25
Script start
Timing: Jan 30 2025 15:42:25
Module start 'content'
Timing: Jan 30 2025 15:42:25
Module end 'content'
Timing: Jan 30 2025 15:42:26
Script end

Main resources:

Total runtime0.3351 sec
Peak memory usage8,192.0000 KB
Database Queries141

Timing points:

CheckpointStart (sec)Duration (sec)Memory at start (KB)Memory used (KB)
Script start 0.00000.0106 614.3984370.2656
Module start 'content' 0.01060.0201 984.66411,006.8359
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Script end 0.3350  5,884.3203 

Time accumulators:

 Accumulator Duration (sec) Duration (%) Count Average (sec)
Ini load
Load cache0.00421.2636200.0002
Check MTime0.00130.3752200.0001
Mysql Total
Database connection0.00060.174510.0006
Mysqli_queries0.226367.54711410.0016
Looping result0.00160.47321390.0000
Template Total0.303990.710.3039
Template load0.00070.210410.0007
Template processing0.303290.484910.3032
Override
Cache load0.00050.142110.0005
Sytem overhead
Fetch class attribute can translate value0.00170.502010.0017
XML
Image XML parsing0.00040.111310.0004
General
dbfile0.01223.6299200.0006
String conversion0.00000.001530.0000
Note: percentages do not add up to 100% because some accumulators overlap

CSS/JS files loaded with "ezjscPacker" during request:

CacheTypePacklevelSourceFiles
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Templates used to render the page:

UsageRequested templateTemplateTemplate loadedEditOverride
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 Number of times templates used: 1
 Number of unique templates used: 1

Time used to render debug report: 0.0002 secs