Sample data 1.0.0beta raises error "undefined method getWriteConnection()"

[sydekumf]

I installed the sample data after the installation of Magento via console and I get the following error:
Fatal error: Call to undefined method Magento\Catalog\Model\Resource\Product\Interceptor::getWriteConnection() in /private/var/www/magento/magento2/app/code/Magento/SampleData/Module/Catalog/Setup/Product/Gallery.php on line 144

If you search for getWriteConnection() in the whole Magento source you won't even find this method :-) So how is it supposed to work? Thanks a lot.

[mazhalai]

@sydekumf this is a known issue if you are using the develop branch. If you need to use sample data, please get the codebase from the master branch.

[mazhalai]

Closing as duplicate of #1636 , #1610 , and #1757.