ArcGIS Pro - Create a many-to-many relationship class

LukaGregoriGrgič — Tue, 13 May 2025 14:05:25 GMT

I am trying to create a many-to-many relationship with an pre-populated intermediate table with attributes, using the "Table to Relationship Class" tool.

I am following the workflow presented in the ArcGIS Blog "Explore a many-to-many relationship" by Diana Muresan (https://www.esri.com/arcgis-blog/products/arcgis-pro/data-management/explore-a-many-to-many-relationship-class) but with no result: related records are not displayed

The relationship class is created and appears in the project database. I add it to the the map ("Add to Current Map" from project database) where it appears as a stand-alone table.

I also tried to remove the original feature class from the map and and re-add it from "Catalog" pane, but with no result.

As a benchmark, I also develop the example described in the Muresan's article, but also in this case I never get the expected result (see attached picture from step 8 of chapter "Explore the related records and relationship class").

LukaGregoriGrgi_0-1747144197165.png

I am using ArcGIS Pro 3.4.3.

Any suggestion? Thank you

Re: ArcGIS Pro - Create a many-to-many relationship class

EvanManrow — Thu, 05 Jun 2025 22:35:37 GMT

For whatever it's worth, I get the same result with a minimal example of a fresh polygon FC, a clean standalone Table with a single text field, and a simple intermediate table with just GUIDs for the polygons and table entries. The `Table to Relationship Class` Tool no longer creates relationships on the Feature Class.

EvanManrow_0-1749162766818.png

Using the `Create Relationship Class` tool isn't much better: for many-to-many relationships, it creates the intermediate table and the relates on the feature layer and table, but they can only be edited in Pro (not Map Viewer, Field Maps, Experience Builder, or any other way I have found).

After three days of trying, I believe many-to-many relates are simply broken.

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ArcGIS Pro - Create a many-to-many relationship class

Re: ArcGIS Pro - Create a many-to-many relationship class