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Your invite expired at noon. MongoDB might still have it at 12:01.

TTL indexes remove expired documents in the background. Check expiresAt when someone opens the invite so access ends on time. Let TTL handle deletion.

#MongoDB #BackendDev

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MongoDB returned 20 documents after examining 80,000. The response body won’t tell you that.

Run explain("executionStats") and compare totalDocsExamined with nReturned. A big gap gives you a reason to inspect the query plan.

#MongoDB #Databases

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In Express, “me” can accidentally become a user ID.

Register /users/:id first and it can catch GET /users/me. Put the literal /users/me route above the parameterized one, then test both URLs.

#ExpressJS #WebDev

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Express 5 can save you a try/catch block in every async route.

When a promise returned by the handler rejects, Express forwards the error automatically. Put your four-argument error middleware after the routes to handle those failures in one place.

#ExpressJS #NodeJS

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A 2 GB download shouldn’t need 2 GB of server memory.

In Node.js, stream the file with pipeline(). If the client downloads slowly, backpressure slows the read so your server doesn’t have to buffer the whole file.

#NodeJS #BackendDev

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One expensive loop can make every Node.js request behind it wait.

Adding async won’t move the calculation off the event loop. For recurring CPU-heavy work, a worker_threads pool can keep that work off the main thread.

#NodeJS #JavaScript

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@sristhi_saha C for me

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Your repository test passed. PostgreSQL still rejected the query.

If production uses Postgres, run integration tests against a Postgres container. Spring Boot’s @ServiceConnection can supply the connection details from Testcontainers.

#SpringBoot #Testcontainers

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A 200 OK can still take five seconds.

Spring Boot Actuator gives you a health endpoint and access to request timing metrics. Use both. An API can be up while users are staring at a spinner.

#SpringBoot #Observability

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Spring Boot - Java

A strong choice for large, complex applications.

Pros:-
• Great for enterprise applications
• Strong security and scalability
• Excellent database integration

Cons:-
• Steeper learning curve
• Can use more memory

Best for: Enterprise systems, banking apps, and microservices.

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Django, Node.js, or Spring Boot?

Which backend should you choose?

Let's compare their strengths, weaknesses, and best use cases.
#Backend #WebDev #Programming

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Node.js - JavaScript

A great choice for fast, real-time applications.

Pros:-
• JavaScript on both frontend and backend
• Great for real-time apps and APIs
• Huge npm ecosystem

Cons:-
• CPU-heavy tasks can block the event loop
• Requires more setup and library choices

Best for: APIs, chat apps, and real-time services.

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@X4DX54 Yes that's why after having a haircut 2 days back ,people are still telling me - "Bro I think you need a haircut "😂😂

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A typo in mail.timeout should break startup before it breaks your first email.

In Spring Boot, group your mail settings with @ConfigurationProperties. Add @Validated and constraints so invalid values fail when the app starts.

#SpringBoot #Java

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The cheapest Django query is the one you skip.

If you only need a yes/no answer, use .exists(). If you’re about to loop through the same unevaluated QuerySet anyway, .exists() can add a database trip before you fetch the rows.

#Django #Python

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@nikkuv5787 😂😂

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@CodeWithAmann If you know, you know. Unkilllll really cooked!!!

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The customer got “Order confirmed.” The order never made it into the database.

That can happen when you send an email inside a Django transaction that later rolls back. Register the send with transaction.on_commit() so it runs after the commit.

#Django #BackendDev