README

This is just a TYPO3 demo extension to show you possibilities on how to get records from database by TYPO3 API.

Please have a look into ProductRepository class. There are currently 4 main methods collecting records:

• by Extbase Query
• by TYPO3 QueryBuilder injected into Extbase Query
• by just TYPO3 QueryBuilder
• by getRecords() of ContentObjectRenderer

Extbase Query

Use it as often and whereever possible.

PROS:

• It is short (less code)
• Workspace overlay integrated
• Language overlay integrated
• Translated records are respecting ORDER BY
• COUNT on JOINed tables is working. Extbase changes SELECT to COUNT(DISTINCT table.uid)

CONS:

• It's always SELECT *
• You can not change the SELECT part. Working with AVG(), SUBSTRING(), ... is not possible
• GROUP BY is not implemented
• There is no possibility to sort sub records

TYPO3 QueryBuilder with Extbase Query

It's OK for single table usage. Don't use it with JOINs because of the COUNT problem.

PROS:

• You can modify all query parts to your need
• Extendability: Send QueryBuilder to a Hook, Event or other method and you can change everything

CONS:

• COUNT on JOINed tables is not working. SELECT is still COUNT() instead of COUNT(DISTINCT table.uid)
• A JOIN produces a cartesian product
• On JOINed tables you have to add GROUP BY on your own
• If you're working with ONLY_FULL_GROUP_BY you have to add ALL columns of SELECT to GROUP BY.
• It's up to you to JOIN tables correctly. Do not forget to add tablenames, fieldname and all the other matching columns (from TCA)
• You have to add the storage PIDs on your own
• It's your job to modify your query for correct language handling

Plain TYPO3 QueryBuilder

This is for TYPO3 Pros only. You really have to know what you're doing.

PROS:

• Do whatever you want
• COUNT() is always right, as it was NOT set by an automatism

CONS:

• The resultset is not compatible with QueryResultInterface. So, you're working with the already fetched records
• You have to call versionOL()
• You have to call getLanguageOverlay()
• If you want sorted and translated records you have to add a really huge extra query on your own
• You have to map your resultset to domain models on your own
• You have to work with your own Pagination/Paginator or you have to work with full resultset as array
• You have to add the storage PIDs on your own
• A method to collect JOINed query can be a lot of work and very very long

getRecords of cObj

Very easy. The Typo3DatabaseProcessor of fluid package also uses this method. Translation and Workspacing will be done for you.

PROS:

• Easy
• Syntax is known since ages
• You can modify SELECT part
• You can work with JOINs
• GROUP BY is also possible

CONS:

• Remember special syntax for column identifier: {#column}
• Multiple JOINs can be very messy
• As table alias is not possible, you always have to use full tablename: tx_sfjoin_domain_model_product.title instead of p.title
• Fixed collection of allowed SELECT functions: COUNT|MAX|MIN|AVG|SUM|DISTINCT
• ORDER BY on translated records is not possible. Records are sorted in default language. Records were translated 1:1 not respecting ORDER BY.