Check Key Existence Action Steps

1. Action Definition
   
   • Open your project on the Kuika platform.

• Click the Add Action button on the right side and select the Check Key Existence action.

2. Cache Key Determination

• Select the key you want to check. This key must have been added previously with Push To Cache.
• Example: user_123_filters

3. Using the Cache Provider
   
   • Must be the same as the cache provider where the key is located (InMemory, Redis, Mongo, or SQL).
4. Running and Testing the Action
   
   • Run the action in Preview mode.
   • As output, you can verify whether the key is in the cache.
   • If you are using Redis, you can check the existence of the key via the terminal with redis-cli -h localhost -p 6379.

Important Points

• The Check Key Existence action is only valid for keys added with Push To Cache or already existing in the cache.
• When InMemory is selected, the key will be lost because the values will be deleted when the application is closed.
• If the key is not found, the action may return false or an error; it is important to add conditions accordingly in subsequent actions.