Fix MongoDB connection string configuration for Docker deployment

- Add environment variable mapping for MongoDB connection string
- Improve InfrastructureModule with fallback connection string handling
- Add comprehensive environment variable mapping in Program.cs
- Update environment template with Render.com deployment instructions
- Resolve MongoDB connection string empty error in production

Author: Dang

VehicleShowroomManagement/CONFIGURATION_FIX.md

@@ -25,7 +25,7 @@
 Create a `.env` file in the project root with the following variables:
 
 ```bash
-# MongoDB Connection
+# MongoDB Connection (REQUIRED)
 MONGODB_CONNECTION_STRING=mongodb://localhost:27017/VehicleShowroomManagement
 
 # JWT Configuration (REQUIRED)
@@ -53,6 +53,17 @@ DOTNET_RUNNING_IN_CONTAINER=false
 PORT=10000
 ```
 
+### For Render.com Deployment
+
+Set these environment variables in your Render.com dashboard:
+
+1. **MongoDB**: `MONGODB_CONNECTION_STRING=mongodb+srv://username:[email protected]/VehicleShowroomDB`
+2. **JWT**: `JWT_KEY=your-production-jwt-key-at-least-32-characters`
+3. **JWT Issuer**: `JWT_ISSUER=VehicleShowroomManagement`
+4. **JWT Audience**: `JWT_AUDIENCE=VehicleShowroomManagement-Users`
+5. **Email Settings**: Configure your SMTP settings
+6. **Cloudinary**: Set up your image hosting service
+
 ### Production Deployment
 
 For production deployment (e.g., Render.com), set these environment variables:

VehicleShowroomManagement/env.template

@@ -1,10 +1,10 @@
 # Vehicle Showroom Management Environment Configuration Template
 # Copy this file to .env and fill in your actual values
 
-# MongoDB Connection
+# MongoDB Connection (REQUIRED)
 MONGODB_CONNECTION_STRING=mongodb://localhost:27017/VehicleShowroomManagement
 
-# JWT Configuration
+# JWT Configuration (REQUIRED)
 JWT_KEY=your-super-secret-jwt-key-that-is-at-least-32-characters-long-for-security
 JWT_ISSUER=VehicleShowroomManagement
 JWT_AUDIENCE=VehicleShowroomManagement-Users
@@ -27,3 +27,16 @@ CLOUDINARY_API_SECRET=your-api-secret
 ASPNETCORE_ENVIRONMENT=Development
 DOTNET_RUNNING_IN_CONTAINER=false
 PORT=10000
+
+# For Render.com deployment, set these environment variables in your dashboard:
+# MONGODB_CONNECTION_STRING=mongodb+srv://username:[email protected]/VehicleShowroomDB
+# JWT_KEY=your-production-jwt-key-at-least-32-characters
+# JWT_ISSUER=VehicleShowroomManagement
+# JWT_AUDIENCE=VehicleShowroomManagement-Users
+# EMAIL_SMTP_HOST=smtp.gmail.com
+# EMAIL_SMTP_PORT=587
+# [email protected]
+# EMAIL_SMTP_PASSWORD=your-app-password
+# CLOUDINARY_CLOUD_NAME=your-cloud-name
+# CLOUDINARY_API_KEY=your-api-key
+# CLOUDINARY_API_SECRET=your-api-secret

VehicleShowroomManagement/src/Infrastructure/DependencyInjection/InfrastructureModule.cs

@@ -23,8 +23,22 @@ protected override void Load(ContainerBuilder builder)
             // Configure MongoDB class maps (must be done before any MongoDB operations)
             MongoDbClassMapConfiguration.Configure();
 
-            // MongoDB Configuration
+            // MongoDB Configuration with fallback
             var connectionString = configuration.GetConnectionString("MongoDB");
+            
+            // If connection string is empty, try to get from environment variables
+            if (string.IsNullOrWhiteSpace(connectionString))
+            {
+                connectionString = Environment.GetEnvironmentVariable("MONGODB_CONNECTION_STRING") 
+                    ?? Environment.GetEnvironmentVariable("ConnectionStrings__MongoDB")
+                    ?? "mongodb://localhost:27017/VehicleShowroomManagement"; // Fallback for development
+            }
+            
+            if (string.IsNullOrWhiteSpace(connectionString))
+            {
+                throw new InvalidOperationException("MongoDB connection string is not configured. Please set MONGODB_CONNECTION_STRING environment variable or ConnectionStrings:MongoDB in configuration.");
+            }
+            
             var mongoClient = new MongoClient(connectionString);
             var database = mongoClient.GetDatabase("VehicleShowroomDB");
 

VehicleShowroomManagement/src/WebAPI/Program.cs

@@ -42,6 +42,81 @@
 
     var builder = WebApplication.CreateBuilder(args);
 
+    // Add environment variables to configuration
+    builder.Configuration.AddEnvironmentVariables();
+    
+    // Map environment variables to configuration keys
+    var mongoConnectionString = Environment.GetEnvironmentVariable("MONGODB_CONNECTION_STRING");
+    if (!string.IsNullOrWhiteSpace(mongoConnectionString))
+    {
+        builder.Configuration["ConnectionStrings:MongoDB"] = mongoConnectionString;
+        Log.Information("MongoDB connection string loaded from environment variable");
+    }
+    
+    var jwtKey = Environment.GetEnvironmentVariable("JWT_KEY");
+    if (!string.IsNullOrWhiteSpace(jwtKey))
+    {
+        builder.Configuration["Jwt:Key"] = jwtKey;
+        Log.Information("JWT Key loaded from environment variable");
+    }
+    
+    var jwtIssuer = Environment.GetEnvironmentVariable("JWT_ISSUER");
+    if (!string.IsNullOrWhiteSpace(jwtIssuer))
+    {
+        builder.Configuration["Jwt:Issuer"] = jwtIssuer;
+        Log.Information("JWT Issuer loaded from environment variable");
+    }
+    
+    var jwtAudience = Environment.GetEnvironmentVariable("JWT_AUDIENCE");
+    if (!string.IsNullOrWhiteSpace(jwtAudience))
+    {
+        builder.Configuration["Jwt:Audience"] = jwtAudience;
+        Log.Information("JWT Audience loaded from environment variable");
+    }
+    
+    // Map other environment variables
+    var emailHost = Environment.GetEnvironmentVariable("EMAIL_SMTP_HOST");
+    if (!string.IsNullOrWhiteSpace(emailHost))
+    {
+        builder.Configuration["EmailSettings:SmtpHost"] = emailHost;
+    }
+    
+    var emailPort = Environment.GetEnvironmentVariable("EMAIL_SMTP_PORT");
+    if (!string.IsNullOrWhiteSpace(emailPort))
+    {
+        builder.Configuration["EmailSettings:SmtpPort"] = emailPort;
+    }
+    
+    var emailUsername = Environment.GetEnvironmentVariable("EMAIL_SMTP_USERNAME");
+    if (!string.IsNullOrWhiteSpace(emailUsername))
+    {
+        builder.Configuration["EmailSettings:SmtpUsername"] = emailUsername;
+    }
+    
+    var emailPassword = Environment.GetEnvironmentVariable("EMAIL_SMTP_PASSWORD");
+    if (!string.IsNullOrWhiteSpace(emailPassword))
+    {
+        builder.Configuration["EmailSettings:SmtpPassword"] = emailPassword;
+    }
+    
+    var cloudinaryCloudName = Environment.GetEnvironmentVariable("CLOUDINARY_CLOUD_NAME");
+    if (!string.IsNullOrWhiteSpace(cloudinaryCloudName))
+    {
+        builder.Configuration["CloudinarySettings:CloudName"] = cloudinaryCloudName;
+    }
+    
+    var cloudinaryApiKey = Environment.GetEnvironmentVariable("CLOUDINARY_API_KEY");
+    if (!string.IsNullOrWhiteSpace(cloudinaryApiKey))
+    {
+        builder.Configuration["CloudinarySettings:ApiKey"] = cloudinaryApiKey;
+    }
+    
+    var cloudinaryApiSecret = Environment.GetEnvironmentVariable("CLOUDINARY_API_SECRET");
+    if (!string.IsNullOrWhiteSpace(cloudinaryApiSecret))
+    {
+        builder.Configuration["CloudinarySettings:ApiSecret"] = cloudinaryApiSecret;
+    }
+    
     // Configure environment-specific settings
     if (Environment.GetEnvironmentVariable("DOTNET_RUNNING_IN_CONTAINER") == "true")
     {