All policies getting deleted from the database about node-casbin HOT 7 CLOSED

Good to hear it works! I have added your project to our site: https://casbin.org/ Let us know if you have more questions and welcome contributing back :)

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@nodece @hsluoyz When we add a new policy, should we avoid calling savePolicy() after addPolicy() - To avoid cleanup of entries each time?

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@hsluoyz Cool, thanks for the reply! We've just tested by removing the call to savePolicy() and it seems to work as you've mentioned.

Good work on the project, we have started using casbin for implementing the ACL/Permission model in our opensource project - https://github.com/tmobile/jazz. Also, we're thinking of contributing back by putting together DynamoDB adapter in NodeJs.

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Yes. first delete all policy then renew add all policy.

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Appreciate the quick response. I didn't understand your comment. On the adapter level, I see whenever we save policy we delete all the policies and add the polices again. But on the node-casbin level, after we create a new enforcer we only need to do an add policy and then a save policy.

In the code, we are saving the policy whenever we do add policy. What is happening is that for the inital number of policies, all is working fine. After a certain number of policies, the lib truncates the table and then adds the new policies. So instead of having all the old policies + new policies, we have only the new policies

The following is the basic structure that we follow:

1. Create a new enforcer with the rbac model and the mysql db connection detail
   enforcer = await casbin.newEnforcer('./config/rbac_model.conf', conn);
2. Add policies or remove policies as required
   enforcer.addPolicy(policy.userId, ${serviceId}_${policy.category}, policy.permission));
3. save policy
   await enforcer.savePolicy();

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casbin enable autosave by default.
Call addPolicy() method then casbin will add a new policy to DB.
savePolicy() method will delete all policy then save all policy.

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Hi @devsatishm @pspani , when AutoSave feature is supported and enabled on the adapter, you don't need to call savePolicy() manually, each new policy rule will be automatically saved from local enforcer memory to the remote DB each time you call addPolicy(). See: https://casbin.org/docs/en/adapters#autosave savePolicy() deletes all policy rules in DB first, then save all the policy rules from local enforcer to the DB in bulk operations. It is not good for scenario of large number of policy rules.

As far as I know, all our Node.js adapters support AutoSave.

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