refactor: clean project based session01 notes

ProjectOrientedSessions/Session01/Session01 Additional Info.md

@@ -102,12 +102,9 @@ var invalidUser = new User(); // ❌ Compilation Error: Name is required
 
 ## **A note about strings in C# (Chat GPT) :**
 **`string` is nullable in C#**, but in **nullable reference types (C# 8+), `string` is treated as non-nullable unless explicitly marked `string?`**.
-
 - **`string`** → Default behavior (non-nullable by default in nullable context).
 - **`string?`** → Explicitly nullable.
 
-
-
 ## **Why virtual navigation properties? (Chat GPT):**
 
 - If you mark a navigation property as `virtual`, EF Core **creates a proxy class** at runtime that overrides the property and loads related data **only when accessed**.
@@ -148,3 +145,5 @@ var tickets = context.Tickets.ToList(); // Loads all tickets foreach (var ticket
 
 ---
 
+
+

ProjectOrientedSessions/Session01/Session01 Backend.md

@@ -1,21 +1,24 @@
-# Branching
+
+# 🛠️ Task Checklist
+
+## Preparation 
+### EF Core Code First
+ - [ ] Watch this [video](https://www.youtube.com/watch?v=b8fFRX0T38M&ab_channel=PatrickGod)
+## 🚧 Branching
 - [ ] Create the develop branch
 - [ ] Create the feature/domain-entities branch based on develop 
-
+## `IEntity.cs`
-# `IEntity.cs`
 - [ ] Create the IEntity **interface**
-
+📂 Suggested Folder: `Domain/Framework/Interfaces`
-> Location: Domain Project > Framework > Interfaces
 ```C#
 public interface IEntity<TKey>
 {
     public TKey Id { get; set; }
 }
 ```
-# `Entity.cs`
+## `Entity.cs`
 - [ ] Create the Entity **class**
-
+📂 Suggested Folder: `Domain/Framework/Base`
-> Location: Domain Project > Framework > Base 
 ```C#
 public class Entity<TKey> : IEntity<TKey>
 {
@@ -23,20 +26,25 @@ public class Entity<TKey> : IEntity<TKey>
 }
 ```
 
-### Why do we need IEntity and Entity? (Chat GPT):
-> this approach is **valid and commonly used** in **Domain-Driven Design (DDD)** and **Clean Architecture**. It provides **consistency**, **reusability**, and **common functionality** across all entities.
-# Create Entities 
-> Location: Domain Project > Aggregates > (RelatedFolder)
-
-### They all (with the exception of join tables) should inherit Entity, and you should specify the datatype of the Id
-### Use the latest version of ERD to specify the properties
-### You can use this project as a reference:
-https://github.com/MehrdadShirvani/AlibabaClone-Backend/tree/develop/AlibabaClone.Domain/Aggregates
-### Link to the ERD:
-https://github.com/TheOrderOfPhoenix/ASP.NET/tree/main/02_ProjectOrientedSessions/docs
-
-### One Example:
 
+## Create Entities 
+📂 Suggested Folder: `Domain/Aggregates/[RelatedFolder]`
+Entities represent the core business objects in our domain model. By defining them explicitly and consistently, we ensure that:
+- Our domain logic remains **clear and maintainable**.
+- We follow **Domain-Driven Design (DDD)** principles, keeping the business rules close to the data they govern.
+- All developers have a **standardized structure** to follow, improving code readability and collaboration.
+### Guidelines
+1. **Base Class**
+    - All entities (except join tables) must inherit from `Entity` and explicitly specify the datatype of their `Id`.
+2. **Properties**
+    - Use the **latest version of the ERD** to define properties and relationships.
+3. **Reference Project**
+    - For implementation details, you can refer to this project:  
+        👉 [AlibabaClone-Backend Domain Layer](https://github.com/MehrdadShirvani/AlibabaClone-Backend/tree/develop/AlibabaClone.Domain/Aggregates)
+4. **ERD Reference**
+    - Latest ERD available here:  
+        👉 [Project ERD](obsidian://open?vault=ASP.NET&file=Repo%2FProjectOrientedSessions%2Fdocs%2FAlibabaERD-Version02.pdf)### One Example:
+### Example
 ```C#
 public class Account : Entity<long>
 {
@@ -44,40 +52,32 @@ public class Account : Entity<long>
     public required string Password { set; get; }
     public string? Email { get; set; }
     public long? PersonId { get; set; }
+    //...
 }
 ```
 
-# Add Navigation Properties 
-### What is a navigation property? (the following pieces of code are just there for educational purposes)
-#### **🔹 Navigation Properties in Entity Framework Core: Everything You Need to Know**
 
----
 
-#### **📌 What Are Navigation Properties?**
+
+
+
+
+
+
+## Add Navigation Properties 
 
 Navigation properties in Entity Framework Core (EF Core) **represent relationships between entities**. They allow you to **navigate** (follow) the relationships between different tables using **C# objects** instead of writing SQL joins manually.
+### Add the needed navigation properties inside entities
+- [ ] Figure out what navigation properties are needed based on the ERD, and use this project as a reference:
+https://github.com/MehrdadShirvani/AlibabaClone-Backend/tree/develop/AlibabaClone.Domain/Aggregates
+- [ ] Don't forget to mark all the navigation properties as `virtual`
 
-For example, if you have a **Ticket** entity related to a **Buyer**, the navigation property allows you to access the buyer from a ticket without writing a separate SQL query.
+### **🔹 Examples of Defining Navigation Properties**
 
----
-
-#### **🔹 Types of Navigation Properties**
-
-Navigation properties can be of two types:
-
-| Relationship Type                  | Description                                                                   |
-| ---------------------------------- | ----------------------------------------------------------------------------- |
-| **Reference Navigation Property**  | Represents a **single entity** related to another (one-to-one or many-to-one) |
-| **Collection Navigation Property** | Represents **a list of related entities** (one-to-many or many-to-many)       |
-
----
-
-#### **🔹 How to Define Navigation Properties?**
-
-##### **🔹 One-to-Many Example**
 
+>These are just examples, and not how the project should look like
+#### **🔹 One-to-Many Example**
 A **Buyer** can have **multiple Tickets**, but each **Ticket** belongs to one **Buyer**.
-
 ```csharp
 public class Buyer
 {
@@ -98,7 +98,7 @@ public class Ticket
 }
 ```
 
-##### **🔹 One-to-One Example**
+#### **🔹 One-to-One Example**
 
 A **Ticket** can have only **one Transaction**, and a **Transaction** belongs to exactly **one Ticket**.
 
@@ -121,7 +121,7 @@ public class Transaction
 }
 ```
 
-##### **🔹 Many-to-Many Example**
+#### **🔹 Many-to-Many Example**
 
 A **Buyer** can buy **many Tickets**, and each **Ticket** can be bought by **many Buyers** (if resale is allowed).
 
@@ -144,13 +144,23 @@ public class Ticket
 }
 ```
 
-### Add the needed navigation properties inside entities
+## Add Packages to Infrastructure Project
-- [ ] Figure out what navigation properties are needed based on the ERD, and use this project as a reference:
-https://github.com/MehrdadShirvani/AlibabaClone-Backend/tree/develop/AlibabaClone.Domain/Aggregates
-- [ ] Don't forget to mark all the navigation properties as `virtual`
-
-# Add Packages to Infrastructure Project
 - [ ] Add `Microsoft.EntityFrameworkCore.Proxies` to Infrastructure Project
-# Merge
+## 🚧 Merge
 - [ ] Create a PR and merge the current branch with develop
+# 🧠 Hints & Notes
+- Mark navigation properties `virtual` 
+# 🙌 Acknowledgements
+
+- ChatGPT for snippet refinement and explanations
+
+# 🔍 References
+[[Session01 Additional Info]]
+
+
+
+
+
+
+
 

ProjectOrientedSessions/Session01/Session01 Preparation.md

@@ -1,21 +0,0 @@
-
-# EF Core Code First
-https://www.youtube.com/watch?v=b8fFRX0T38M&ab_channel=PatrickGod
-# Repository Pattern
-
-## Brief Introduction (without DB Context)
-https://www.youtube.com/watch?v=Wiy54682d1w&ab_channel=PatrickGod
-## More detailed Introduction:
-https://youtu.be/rtXpYpZdOzM
-## Purpose:
-Meditates between the domain and data mapping layers, acting like an **in-memory collection** of domain objects
-## Benefits
-- Minimizes duplicate query logic 
-- Decouples your application from persistence frameworks
-- Promotes testability
-> Repository should not have methods like Update and Save
-# Unit of Work
-Keeps track of changes and coordinates the writings and savings
-## Implementation:
-https://youtu.be/rtXpYpZdOzM?t=703
-