With Rails 4, Concerns have become the “official” solution to the big-models problem. However, there’s a fair amount of controversy about this topic in the community. Not everyone is convinced that Concerns are the “right“ solution to the problem of AR models becoming too big.

In this talk we will see what Rails Concerns are and how can we use them to keep our models fit. More interestingly, we’ll discuss the trade-offs of this technique, the different views in the community and a couple of alternatives.

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