omega/DATABASE_SCHEMA.md

-- ################################################################## -- ## Core Entity Tables -- ##################################################################

-- users: Stores individual user information and credentials. CREATE TABLE users ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), email VARCHAR(255) UNIQUE NOT NULL, password_hash VARCHAR(255) NOT NULL, full_name VARCHAR(255), created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(), updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW() );

-- roles: Defines the roles that can be assigned to users. CREATE TABLE roles ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), -- CHANGED: from SERIAL to UUID name VARCHAR(50) UNIQUE NOT NULL -- e.g., 'admin', 'member', 'billing_manager' );

-- permissions: Defines specific, granular permissions. CREATE TABLE permissions ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), -- CHANGED: from SERIAL to UUID name VARCHAR(100) UNIQUE NOT NULL -- e.g., 'project:create', 'task:delete', 'user:invite' );

-- types: Stores the different "types" a project can be, now linked to a user. CREATE TABLE types ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), -- CHANGED: from SERIAL to UUID user_id UUID REFERENCES users(id) ON DELETE SET NULL, -- ADDED: Makes types user-specific. Can be NULL for system default types. name VARCHAR(100) NOT NULL, description TEXT, UNIQUE(user_id, name) -- A user can't have two types with the same name. );

-- projects: The central table for projects. CREATE TABLE projects ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), name VARCHAR(255) NOT NULL, description TEXT, owner_id UUID NOT NULL REFERENCES users(id), type_id UUID NOT NULL REFERENCES types(id), -- CHANGED: from INT to UUID created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(), updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW() );

-- tasks: Stores tasks, which belong to a project. CREATE TYPE task_status AS ENUM ('todo', 'in_progress', 'done', 'canceled'); CREATE TYPE task_priority AS ENUM ('low', 'medium', 'high');

CREATE TABLE tasks ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), title VARCHAR(255) NOT NULL, description TEXT, status task_status NOT NULL DEFAULT 'todo', priority task_priority NOT NULL DEFAULT 'medium', project_id UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE, due_date DATE, created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(), updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW() );

-- integrations: Stores configuration for integrations linked to a project. CREATE TABLE integrations ( id UUID PRIMARY KEY DEFAULT gen_random_uuid(), project_id UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE, type VARCHAR(50) NOT NULL, -- e.g., 'github', 'slack' config JSONB NOT NULL, created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(), updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(), UNIQUE(project_id, type) );

-- ################################################################## -- ## Join Tables (for Relationships) -- ##################################################################

-- user_roles: Assigns global roles to users. CREATE TABLE user_roles ( user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE, role_id UUID NOT NULL REFERENCES roles(id) ON DELETE CASCADE, -- CHANGED: from INT to UUID PRIMARY KEY (user_id, role_id) );

-- role_permissions: Assigns permissions to roles. CREATE TABLE role_permissions ( role_id UUID NOT NULL REFERENCES roles(id) ON DELETE CASCADE, -- CHANGED: from INT to UUID permission_id UUID NOT NULL REFERENCES permissions(id) ON DELETE CASCADE, -- CHANGED: from INT to UUID PRIMARY KEY (role_id, permission_id) );

-- project_members: Links users to the projects they are a part of. CREATE TABLE project_members ( project_id UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE, user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE, role_id UUID NOT NULL REFERENCES roles(id), -- CHANGED: from INT to UUID PRIMARY KEY (project_id, user_id) );

-- task_assignees: Assigns one or more users to a specific task. CREATE TABLE task_assignees ( task_id UUID NOT NULL REFERENCES tasks(id) ON DELETE CASCADE, user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE, PRIMARY KEY (task_id, user_id) );