EDD.md

EDD.md

Overview

This EDD defines the MongoDB data model for the MEAN employee management application.

• Database: meanStackExample
• Primary collection: employees
• Code source of truth: server/src/database.ts

Entities

Employee

Collection: employees

Purpose:

• Stores employee records managed through the Angular UI and Express API.

Fields:

Field	BSON Type	Required	Constraints	Description
_id	ObjectId	No	Generated by MongoDB	Primary key
name	string	Yes	Must be a string	Employee display name
position	string	Yes	minLength: 5	Employee role/title
level	string	Yes	Enum: junior, mid, senior	Seniority level

Validation contract:

• Required fields: name, position, level
• additionalProperties: false
• position minimum length: 5
• level enum values: junior, mid, senior

Indexes:

• Default _id index
• No additional application-managed indexes

Relationships:

• No cross-collection references

API Mapping

Route	Collection Action
GET /employees	List documents from employees
GET /employees/:id	Fetch one document by _id
POST /employees	Insert a new document
PUT /employees/:id	Update fields on an existing document
DELETE /employees/:id	Delete a document by _id

Mermaid Diagram

erDiagram
    EMPLOYEE {
        ObjectId _id
        string name
        string position
        string level
    }

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