HAMPEL SOFTWARE ENGINEERING

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====== 03 FAQ ======

==== Upgrade Instructions ====

  * See [[code:open-source:hse-db:upgrade|98 Upgrade Instructions]]
  * create a subclass of DB-Interface and add decryption in ''Init Interface'' override

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==== How can I encrypt my credentials in the config file? ====
  * read about [[kb:common:encryption|AES encryption]]
  * create a subclass of ''DB-Interface''
  * add decryption before calling the parent's ''Init'' method

{{:code:open-source:hse-db:pasted:20230714-073836.png}}
{{:code:open-source:hse-db:pasted:20230714-073950.png}}

==== Advanced usage in subVI ====

If you want to access a database from a SubVI of a larger DQMH module, but you don't want to start the entire module, there's an easy way to get a DB-Connector running in the SubVI without starting the whole project:
  - Configure DB-Connector in your project
  - Open "Test DB-Connector.vi" and run
    {{ code:open-source:hse-libraries:hse-core-libs:db-con1.png?nolink |}}
  - Press "Run New Module Instance"
    {{ code:open-source:hse-libraries:hse-core-libs:db-con2.png?nolink |}}
  - Your SubVI should already look somewhat like this:
    {{ code:open-source:hse-libraries:hse-core-libs:db-con3.png?nolink |}}
  - Copy value from "Active Modules" to your SubVI "DB Module ID" front panel element and run. The DQMH request VIs send commands to the running instance of DB-Connector
  - When done, use “Stop Module Instance” in DB-Connector and close your SubVI.

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