Merge pull request #402 from qsanah/doc/uml_d

uml design

docs/OnTrack/Multiple Organisations/UML Design.md

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+**Requirements to incorporate multiple organisations on a single OnTrack server – UML Design**
+
+Author: Sanah Quazi
+
+Company: Thoth tech
+
+![](UML.png)
+
+The UML diagram presented above focuses on achieving efficient organisation management, user
+association with organisations, and robust access control. It outlines the database structure for
+accommodating multiple organisations, which consists of two main elements:
+
+Organisations Table: This table, labelled 'organisations,' is responsible for storing
+organisation-specific information. It includes the following key columns:
+
+- organisation_id: This column serves as a unique identifier for each organisation and acts as the
+  primary key for this table.
+- name: The 'name' column holds the organisation's name.
+- description: In the 'description' column, you can find detailed descriptions of each organisation.
+- email: This column stores the official email address associated with the organisation.
+- is_enabled: The 'is_enabled' column is a flag that indicates whether the organisation is currently
+  active or disabled.
+
+Users Table: In addition to the 'organisations' table, the diagram illustrates an update to the
+existing 'users' table. This update includes the addition of an organisation_id column, which serves
+as a foreign key. This column establishes a link between users and their associated organisations,
+allowing for efficient organisation assignment and access control enforcement.
+
+This database design is crucial for the successful implementation of the feature that enables
+multiple organisations within the OnTrack system. It ensures data integrity and provides the
+necessary structure for managing and securing organisational data.
+
+**The relationships between these classes are as follows:**
+
+- organisations to users: This association indicates a multiplicity of one-to-many (1..\*). It means
+  that each organisation in the 'organisations' table can be associated with zero to multiple users
+  from the 'users' table.
+- users to organisations: This association specifies a multiplicity of one-to-one (1..1). It
+  signifies that each user in the 'users' table is uniquely associated with one organisation in the
+  'organisations' table.