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Overview of SQLAlchemy’s Expression Language and ORM Queries
Overview In the previous article, we made a comparison between SQLAlchemy and other Python ORMs. In this article, we are going to take a deeper look at SQLAlchemy’s ORM and Expression Language and use an example to showcase their empowering API and easy-to-understand Python structures. Not only does the SQLAlchemy ORM provide a way to […]
Read MorePython for Android: Android’s Native Dialogs (SL4A)
Android has a range of built-in dialogs that allow apps to interact with users. They can be used to display things like spinners and progress bars, and can be used to prompt the user for some kind of input, like a date or string. All of the methods for creating dialogs live in SL4A’s UI […]
Read MoreUsing Python Django’s ModelForm in Your First Django Application
Django’s ModelForm In our previous article, How to Use Python Django Forms, we learned how to create Django form objects and use them inside templates for common tasks such as data validation and HTML generation. In this article, we are going to learn how to use Django’s ModelForm to create forms directly from models. Compared […]
Read MoreHow to Use Python Django Forms
Django Form What is a HTML form? What kind of use cases does it have? A webform, web form or HTML form on a web page allows a user to enter data that is sent to a server for processing. Forms can resemble paper or database forms because web users fill out the forms using […]
Read MorePackage Your Python Django Application into a Reusable Component
Save Time by Writing and Using Reusable Python Django Apps It’s not trivial to design, develop and maintain a web application. Lots of features and aspects have to be handled properly in order for a web application to succeed. To name a few, the features that are common to almost every web application are user […]
Read MoreManaging Static Files for Your Django Application
Django’s Default Static File Manager In every web application, static files such as css, Javascript and images, give the website a unique look-and-feel and make it stand out of the crowd. For any user, a beautiful, professional looking website is way more attractive than an rough, unpolished one. In a Django application, we manage the […]
Read MoreWriting Tests for Your Django Application’s Views
Testing a Django Application’s View In our previous article, we learned how to write automated tests for our Django application, which involves writing a simple test to verify the behaviour of the model method m.Post.recent_posts() and fixing the bug where the method recent_posts() returns future posts. In this article, we are going to learn how […]
Read MoreWriting Automated Tests for Your First Django Application
Tests, Tests and More Tests As a software programmer, you often hear others talking about tests being one of the most important components of any project. A software project often succeeds when there’s proper test coverage. While it often fails when there’s little or none. You might be wondering: what are tests anyway? Why is […]
Read MoreWriting Views to Upload Posts for Your First Python Django Application
In the previous article, we wrote an index view to show a list of posts that are created less than two days ago and a detail view to show the detailed content of a post. In this article, we’re going to write a view that allows the user to upload a post and improve our […]
Read MoreIntroductory Tutorial of Python’s SQLAlchemy
Python’s SQLAlchemy and Object-Relational Mapping A common task when programming any web service is the construction of a solid database backend. In the past, programmers would write raw SQL statements, pass them to the database engine and parse the returned results as a normal array of records. Nowadays, programmers can write Object-relational mapping (ORM) programs […]
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