TYPO3 Exception 1353170925

The relation information for property "..." of class "..." is missing.

If you have a property in a class SomeModelYY which has another class as type

/**
* @var TX\ext_key\Domain\Model\SomeOtherModelZZ
*/
protected $propertyXX;
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the object will be populated by extbase without any other configuration.

But to make queries like

$query->like("propertyXX.someproperty", '%foo%')
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work, you still have to declare a foreign_table in your TCA.

Also make sure you have the properties with corresponding getters and setters in your model.