[Flow] Upgrade from FLOW3 1.1 to Flow 2.0: error with doctrine:migrate

[François Suter]

Hi Robert,

> This may be a foreign key constraint issue. This is generally tricky,
> but not impossible to solve - key is to find the right order in which
> you can drop primary keys and constraints so nothing else still depends
> on it.

That was it indeed. I thought I had sorted all those queries in the 
right order, but I had got my logic wrong.

> You'll always see that medium-helpful error message with code no. 150.
> Fortunately there's a way to see a bit more: right after the error
> occurred, run a "SHOW ENGINE INNODB STATUS;" query.

Thanks for this tip. That was very useful in getting more details in 
order to figure what was wrong.

Cheers

-- 

Francois Suter

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