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Complex Eloquent Query
A query below selects products that need to be updated in a remote application. It takes quantities of products in host application that are connected to source products application. On top of that it looks at all the orders that are in “Pending” status and reserves quantities for those products. SELECT products.quantity_available, connector_products.stock_id, products.id, connector_products.sku,…
Large CSV Export
Sometimes you need to export a large amount of data from your database. Obviously, if you are going to accumulate all data in an array and then write it to a csv file, you will eventually run out of memory. A better solution is to use streams. Here is how you can export data from…
Stream Filter
In php one can use filters with streams. Sometimes it can become handy. Let’s say you open a .csv file as a stream, but this file is tab separated. Your program can can process coma separated csvs, but not tab separated. This is a good use case for a stream filter, because it can make replacements…
Testing with Service Container
The backbone of Laravel is service container. Service container is used for resolving classes and dependency injection. Container comes as a standalone package, so you don’t have to have Laravel installed to use it. Service container can be very handy when testing. Let’s look at how we can use it . Our basic set up…
Stream Files From S3
When using S3 as our external storage, sometimes we have to let users download files from S3. If file is too large, it may not fit in the memory. The solution is to stream file into user’s browser straight from S3. Let’s take a look how to do it with Laravel’s Filesystem. There are 2…