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I have two similar applications on heroku, is there a way I can make them share databases ? at least for User authentication ?

Right after I got answer to this question the following came to my mind: I will be using the multi app architecture for a long term / heavy network system:

1- First issue I will face is that the more processes I will have interacting with the shared resource, the more likely I will face scaling/performance and timing issues.

2- Complexity of the models, because at some point I'm planning to use rails engines, and I realized it will be a mess of data_model_prefixes.

3- Costy ? Monolithic apps on 1 db VS Many apps.

I found a few other solutions regarding this issue or let's say approach:

1- Letting every application have their own database, then maybe using an api to share the common tables between the applications.

2- If I decided to go to AWS, I can use Amazon RDS plugin that lets model being access from different databases uing ActiveRecord. sources:

https://stackoverflow.com/a/5986996/539075

https://stackoverflow.com/a/3479315/539075

and TaskRabbit explained some part of this very well:

http://tech.taskrabbit.com/blog/2014/02/11/rails-4-engines/

The ugly part is that I have angular on top of Rails, it's just hard to scale at some point!

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1 Answers1

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>heroku config | grep DATABASE

This will give you the database url now you can use these variable values for the second app.

heroku config:set KEY1=VALUE1 [KEY2=VALUE2 ...]

These credentials can be found from heroku dashboard. Tell me if this works for you.

lokeshjain2008
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