Skip to main content

Documentation Index

Fetch the complete documentation index at: https://docs.twenty.com/llms.txt

Use this file to discover all available pages before exploring further.

​
Types of Relations

​
One-to-Many

One record in Object A can be linked to many records in Object B. Example: One Company can have many People (employees).

​
Many-to-One

Many records in Object A can be linked to one record in Object B. Example: Many People can belong to one Company.

​
Relations to Multiple Object Types

Some objects can link to multiple object types on one side of the relation. Example: A Note can be attached to one Person AND one Company AND one Opportunity simultaneously. The Note is on the “many” side, connecting to multiple “one” sides. Similarly, a Project (on the “one” side) could receive links from multiple People, multiple Companies, and multiple Notes.
Import/Export limitation: Relations pointing to multiple object types are not yet supported for CSV import/export. This is on our roadmap.

​
Many-to-Many

Many records in Object A can be linked to many records in Object B. Example: Many People can be linked to many Projects, and vice versa. Many-to-many relations use a junction object pattern: an intermediate object that connects both sides. With the junction relation feature, Twenty displays the final linked records directly, hiding the intermediate object from the UI.
Lab Feature: Junction relations must be enabled at Settings → Updates → Lab before use.
See How to Create Many-to-Many Relations for a complete step-by-step guide.

​
Creating a Relation Field

  1. Go to Settings → Data Model
  2. Select the object where you want to add the relation
  3. Click + Add Field
  4. Select Relation as the field type
  5. Choose the target object(s) to relate to
  6. Configure the relation settings:
    • Field name on source object: The name of the relation field on the object you’re editing
    • Field name on destination object: The name of the relation field that will appear on the target object
    • Relation type (one-to-many, many-to-one)
  7. Click Save

​
Standard Relations

Twenty comes with pre-built relations between standard objects:
From ObjectTo ObjectRelation Type
PeopleCompaniesMany-to-One
OpportunitiesCompaniesMany-to-One
OpportunitiesPeopleMany-to-One

​
Best Practices

​
Planning Relations

  • Map your data model: Plan relations before creating them
  • Consider direction: Think about which object “owns” the relationship
  • Avoid circular dependencies: Keep your data model clean

​
Naming Relations

  • Use clear names: Make it obvious what the relation represents
  • Be consistent: Use similar naming patterns across relations
  • Consider both sides: Name both sides of the relation appropriately

​
Performance

  • Don’t over-relate: Too many relations can slow down your workspace

​
Limitations

  • Deleting relations removes the link but not the related records
  • Circular relations should be avoided for data integrity