Enable User Column Filters

[kmcentush]

For my specific use case, there is a huge advantage to letting my users ultimately export their current column filters and later re-upload them. This can shortcut a lot of manual filtering if the user does pretty routine analysis.

This pull request exposes the ability to both read/write the column filters through the Ag-Grid enterprise setFilterModel and getFilterModel functions. On instantiation (or whenever the AgGrid Streamlit component key changes), these column filters can be applied automatically for the user. After the user filters the data, their filters can be accessed through the new column_filters field in the component value/response.

Please let me know if you have any questions. Happy to create a minimal Streamlit example if my use case is not clear.

Edit: I also fixed a bug in the text_columns aspect of the cast_to_serializable function. That is unrelated to the specific use case here, but I did encounter it while making this PR.

[kmcentush]

@PablocFonseca other than resolving the merge conflicts, is there anything else you would want before merging this PR?

[laky55555]

Hi @kmcentush,
Do you think adding the feature of retrieving current filters would be easy to add?
The use case would be to persist the same filters after the underlying data changes.

[kmcentush]

Hi @laky55555, that's more or less what I did by making these tweaks to the source. You can keep the filters in the streamlit state and apply it whenever the data changes, etc.

Here's the branch I was using in my own setup: https://github.com/cuberg-inc/streamlit-aggrid/commits/feat/col_filters