How to Set Up Parent Category Dropdown Filters Child Subcategory Options

What This Does

Monday.com shows all dropdown options regardless of parent selection, leading to invalid combinations and data quality issues.

Zorpa cascading rules filter child dropdown options based on parent selection. Only valid combinations are shown.

Complexity: beginner | Feature: Cascading Dropdown

Prerequisites

• A Monday.com account (any plan)
• At least one board with dropdown columns
• Zorpa installed from the Monday Marketplace

Step-by-Step Setup

Step 1: Install Zorpa

Navigate to the Monday.com Marketplace, search for "Zorpa", and click Install. Add it to the board where you want dropdown automation.

Step 2: Open Cascading tab

Once installed, open your board and switch to the Zorpa Board View. You'll see the Rules tab where all your automations are configured.

Step 3: Select parent column

Click "Add Rule" and select the dropdown column that should trigger the automation.

Step 4: Select child column

Follow the on-screen prompts to complete this configuration step.

Step 5: Define mappings (Parent Value → [Child Options])

Follow the on-screen prompts to complete this configuration step.

Step 6: Save and enable

Follow the on-screen prompts to complete this configuration step.

Real-World Examples

Ecommerce Brands

Dropdown: Product Category → Subcategory (Electronics → Phones, Laptops, Tablets, Clothing → Men, Women, Kids, Home → Kitchen, Bedroom, Bathroom) Trigger: When value changes to "Electronics" Action: Show only: Phones, Laptops, Tablets, Accessories Impact: Wrong categorization = inventory chaos + wrong warehouse routing

A catalog team adding 50 products/day needs fast, accurate categorization. Without cascading, they scroll through 100+ subcategories to find the right one.

It Services

Dropdown: Ticket Category → Subcategory (Hardware → Laptop, Desktop, Server, Printer, Software → OS, Application, License, Network → WiFi, VPN, Firewall) Trigger: When value changes to "Hardware" Action: Show only: Laptop, Desktop, Server, Printer, Peripheral Impact: Wrong classification = wrong team, slower resolution

A helpdesk processes 100 tickets/day. Without cascading, technicians select 'VPN' under 'Hardware' because it's in the list. Cascading enforces correct classification.

Construction

Dropdown: Trade → Sub-Trade (Mechanical → HVAC, Plumbing, Fire Protection, Electrical → Rough, Finish, Low Voltage, Structural → Foundation, Steel, Concrete) Trigger: When value changes to "Mechanical" Action: Show only: HVAC, Plumbing, Fire Protection, Gas Impact: Wrong trade classification = wrong crew dispatched

On a commercial build, 'Low Voltage' is an electrical sub-trade, not mechanical. Without cascading, field staff mix them up constantly.

Troubleshooting

• Rule not firing? Check that the dropdown column is correctly selected and the trigger value matches exactly (case-sensitive).
• Form submissions not triggering? Ensure you're using Zorpa's form-safe trigger mode, not a standard column change trigger.
• Actions not executing? Verify that the target person/column exists and that Zorpa has the necessary board permissions.

Next Steps

Once your first rule is working, consider adding:

• Cascading dropdowns to validate data entry
• Cross-board sync to keep multiple boards aligned
• Additional trigger rules for other dropdown columns

Install Zorpa to get started.