In this post, I am going to talk about many-to-many relationships and Pivot Tables. You heard about it, perhaps used it but you still don’t fully understand the concept, then keep on ready this post. Pivot tables are very helpful when designing database structure but can be difficult to understand sometimes. Pivot tables are intermediate tables that facilitates relationships between two main tables and even within one table.
When exactly you need Pivot Table
First of all, let’s clear our understanding of scenarios where Pivot Table can help us. As I said it provides many-to-many relationship between two tables, let’s look at some examples when exactly one need many-to-many-relationship and Pivot Table.
If you have used WordPress, you know that you can assign multiple categories to a post. So here, a post can reside in multiple categories and a category can have multiple posts in it. Technically
Post -> Belongs To Many -> Categories
Categories -> Belongs To Many -> Posts
that’s a very basic scenario where you will need pivot table. Here’s what the table structure will look like. Continue reading
Recently we got the chance to look into the load speed issue for one of the project, we are required to improve API performance for a listing screen. The project was built in AngularJS and API being created in Laravel.
Two of the major listing pages of the application has become hell slow with time, 10 seconds to be exact. The application itself is quite big and is going under heavy development for last 2 years. As it’s a SAAS based so data is growing rapidly. In this article, we are going to present the steps we took to improve API performance and how we managed to reduce the Load time of the Laravel API for listing screens which were taking more than 8 sec to just a sec.
This is one of the most common mistakes, especially with those teams which don’t have a special database administrator assigned in the project to manage and create the database, and the task of creating the migration is left for the developer. While creating the migrations for the database, or schema in general, developers tend to ignore creating indexes and they generally get away with it for quite long, Until your application is live and data grows to a point where you start feeling the performance issues, those long spinning loaders drops a hint. Continue reading
Here is the list of some of the useful Laravel Eloquent Tips and Tricks which are usually ignored by developers and not used as much as these should be.
1.) Expressive where syntax
$products = Product::where('category' , 3);
you can do this instead
$product = Product::whereCategory(3);
just append column name in plural case after where
2.) Date filtering
I recently got to work a site which was more like a directory. One of main trick there was to show random advertiser on the site so that each advertiser get’s some chance for displaying on sites front page. That was actually easy until this has to go with pagination. Back then I didn’t even knew if there’s any way to achieve mysql pagination with random ordering.
Problem is, you show some random advertisers on 1st page but on second page you must see another set of random advertisers (excluding what you already seen on 1st page) and so on. you see where’s it’s going?
Mysql Rand(seed) function to rescue
SELECT * FROM your_table ORDER BY RAND(351) LIMIT 10, 10;
Some useful but lesser known PHP functions
In this article I am going to cover up some lesser known but Useful PHP Functions which offers some great functionalities. Not all but many of these are usually re coded. Here’s the list of such Useful PHP Functions and features that I have compiled over time. These might also come in handy for you in your day to day coding.
- Converting Newline to Break – nltobr
- Placeholder replacement – strtr
- Parsing Url – parse_url
- Magic Constants
- Serialization – json_encode & json_decode
Me and team has already spent lot of restless nights and moments in frustration and believe me, do read it out unless you already know what this tip is about, it can save you some serious amount of time.
Tom – The great Tester: It’s not working in IE
Allen – The frustrated developer: What can I do it’s working here at my PC come and check.
Allen has no idea how it’s working on his machine. It’s because he always has developer toolbar opened 🙂
A lot of people still confuses among these three types of apps. This might be of some help.
Native apps will always provide the best experience on the given platform. That is simply because if you build a native app using the SDKs for the platform you are able to optimize for the platform and take advantage of everything the platform has to offer. For apps where the device is the primary factor (i.e. you want the best iPhone experience possible) or milliseconds matter, such as in high-polygon count games like CSR Racing or Galaxy of Fire 2, native development is the only choice. For apps like this you need to take advantage of everything the platform has to offer, from the GPU to the screen pixel depth.
If you are a web developer you must have had a chance to write Email Templates which should work across all major email clients consistently. I too have fought that battle many times and I know it’s hard and frustrating to write and check Cross Client Email Templates.
This article is an attempt to help avoid the frustration one has to go through when designing Cross Client Email Templates. I’ll try to list down the DO’s and DON’Ts that we should adhere to when writing Email Templates for maximum compatibility across email clients. Also I’ll list down the common issues/bugs that are faced in Email Templates and their solutions.
- Use of table for layout
- Make sure to have a correct DOCTYPE Declaration
- Use of inline style
- Issue with empty cells
- White space issue with images
- Close every tag properly
- Properly using the background images
- Specify height, width and alt attribute with images
- Test test and test
Working on one of my project on asp.net and Sql Server has made me learn a lot about both of these technologies. I’ll be sharing my learning and the tricky things which I have learnt here in the form of quick tips.
Here’s the first one. Keep an sharp eye when using NULL in where clause because things wouldn’t be working correctly without you even noticing. Following are the few things which new developers tends to do wrong. And they would’t notice because Sql Server wouldn’t raise any error for these.
- Checking for NULL values
- Checking for NULL in “IN” condition
Many times there comes a situation when we have to add a conditional where part in stored procedure’s query based on the parameters that are been passed to the SP. Let’s take up an example with the following requirement.
We’ll create a SP “FindProduct” which will have two parameters @id and @searchString and it will return the posts that meet the passed parameters. We want to create our procedure as such that it search for the product if one of these parameter is passed.