So inspecting the queries made by your application will help you determine and reduce the total number of queries made. Only you know what your application is doing, how many queries it is making, how many of them are actually in use. There is no one universal solution when optimizing queries in laravel. I found an interesting article on optimizing mysql inserts which will helps in optimizling slow inserts and updates. But sometimes we find a need to optimize insert and update queries. Most cases we only need to optimize the read queries. We so far looked into optimizing select queries for retrieving results from a database. When we want to retrieve latest rows from a table, we would often doġ select * from posts order by id desc 17. Better way to retrieve latest rows from a table So separating this column from the posts table will drastically improve the query performance when there are too many posts. The content for blog post will be really huge and often times, you need this data only if a person is viewing this particular blog post. I personally observed it affected the query time on one of our projects.Ĭonsider a case where you have a table called posts with a column of content which stores the blog post content. When the table has columns with large amounts of data in it, the size of an individual record grows really high. If a table has columns which stores large amounts of data(ex: columns with a datatype of TEXT), it is better to separate them into their own table or into a table which will be less frequently asked. I recommend to follow this tip only if your table has too many records or will grow rapidly. This tip is from personal experience and is not a standard way of architecting your database tables. separate columns with text data type into their own table When you are doing a select * query, you will end up retrieving a bunch of columns which you really do not need. They can be joined together by using their primary and foreign keys.Īdding too many columns to a table will increase the individual record length and will slow down the table scan. Relational databases like mysql, can be leveraged to split the tables with so many columns into multiple tables. It is better to limit the total no of columns in a table. Usually to retrieve results from a database table, we would do the following.ġ select * from posts where created_at >= ' timestamp-here' 14. When can you use chunkById? - If your database table has a primary key column column which is an auto incrementing field. This article explains in detail about the problem with using offset.Īs chunkById is using the id field which is an integer, and the query is using a where clause, the query will be much faster. Generally using limit with offset is slower and we should try to avoid using it. Select * from posts where id > 100 order by id asc limit 100 Select * from posts order by id asc limit 100 The queries made by chunk and chunkById were as follows.

This id field usually be an integer field, and in most cases it would be an auto incrementing field. Whereas chunkById retrieves database results based on an id field. This property maps various points of the Eloquent model's lifecycle to your own event classes.The major difference between chunk and chunkById is that chunk retrieves based on offset and limit.

To start listening to model events, define a $dispatchesEvents property on your Eloquent model. Event names ending with -ing are dispatched before any changes to the model are persisted, while events ending with -ed are dispatched after the changes to the model are persisted. The saving / saved events will dispatch when a model is created or updated - even if the model's attributes have not been changed. The updating / updated events will dispatch when an existing model is modified and the save method is called. When a new model is saved for the first time, the creating and created events will dispatch. The retrieved event will dispatch when an existing model is retrieved from the database. Want to broadcast your Eloquent events directly to your client-side application? Check out Laravel's model event broadcasting.Įloquent models dispatch several events, allowing you to hook into the following moments in a model's lifecycle: retrieved, creating, created, updating, updated, saving, saved, deleting, deleted, restoring, restored, and replicating. In addition to retrieving records from the database table, Eloquent models allow you to insert, update, and delete records from the table as well. When using Eloquent, each database table has a corresponding 'Model' that is used to interact with that table. Laravel includes Eloquent, an object-relational mapper (ORM) that makes it enjoyable to interact with your database.

Laravel eloquent find by primary key