What happens if I install haystack-ai and farm-haystack both?

[crimson206]

Sometimes, It says, some modules are not found. However, I don't know what to install more.

[anakin87]

In short, these two packages are not compatible and you should install only one of them in a single virtual environment.
farm-haystack: Haystack 1.x
haystack-ai: Haystack 2.x -> most of the future development will be included in this package

More information:

• Docs
• Issue

[crimson206]

For all the documents including

pip install haystack-ai # or 
pip install farm-haystack,

Would it be better to add a link to an information that

# We are migrating. If you are jumping between v1 and v2, please run the line first.
pip uninstall -y farm-haystack haystack-ai

Or it might be possible to detect if farm-haystack is already installed when we install haystack-ai, and vice versa.
In this case, you can expose an error message with the information.

I am mostly working with version2, but sometimes I ended up with version1 tutorials.
If I encounter those situations again, I will share the experience.

[rohitm]

The QueryClassifier example uses the farm-haystack pip package whereas your document indexing example uses haystack-ai pip package.
I'm trying to build an example where I'm trying to classify a query before deciding what to do such look up my document index or look up my database. How am I to accomplish this in one script when you're serving me with a warning when both pip packages are incompatible in the same environment ?

[Amnah199]

Hi @rohitm, thanks for bringing this up! If you're using Haystack 2.0, you can perform similar classification tasks with the TransformersZeroShotTextRouter. I suggest checking out the Migration Guide for detailed steps on upgrading your Haystack 1.x pipeline to version 2.0.

We're also working on a tutorial for query classification in Haystack 2.0 which will be added to Haystack tutorials.