ER Model of Online Chat Application
An Entity-Relationship (ER) model for an online chat application typically identifies the main entities involved in the system and their relationships. Here’s a simplified ER model for an online chat application:
Entities:
- User: Represents a user of the chat application.
- Attributes: UserID (Primary Key), Username, Password, Email, Last Active Time, etc.
- Message: Represents a message sent by a user in a chat.
- Attributes: MessageID (Primary Key), SenderID (Foreign Key), ChatroomID (Foreign Key), Content, Timestamp, etc.
- Chatroom: Represents a chatroom where users can engage in group conversations.
- Attributes: ChatroomID (Primary Key), Name, Creation Time, etc.
Relationships:
- Participates: Relates Users to Chatrooms to represent user participation in chatrooms.
- Role Names: Participant (User), Chatroom
- Cardinality: Many-to-Many (A user can participate in multiple chatrooms, and a chatroom can have multiple participants.)
- Contains: Relates Chatrooms to Messages to represent messages contained within chatrooms.
- Role Names: Chatroom, Message
- Cardinality: One-to-Many (A chatroom can contain multiple messages, but a message belongs to only one chatroom.)
Here’s a textual representation of the ER model:
Online Chat Application Project in Software Development
Online chat application is one of the most common software development projects to date. In this article, we are going to make the Online chat application software development project from scratch, college students. We will be covering all the steps you have to do while developing this project.