Yesod has a nice feature to define database models. It uses the persistent library to migrate your database to a state which fits your defined application models. This is true for very new project setups. With time your project will evolve and change. For this case there is no nice solution in Yesod. For instance if you add a column which is mandatory, Yesod is not able to migrate since it does not know what to do with existing data. In this blog post we will present one possible migration path at application start.
11 blog posts
In this blog post we will have a look at Googles reCaptcha v2 integration in Yesod. With this you can secure your (classic) forms from bots.
Yesod is a great Framework, especially in terms of RESTful designed applications. In this blog post, we will cover a more specific topic on how to create a simple CSV file and return it to the client.
Any reasonable web project also contains an area to upload (media) files. It can be an administration area or just for users who can upload their profile picture. In this blog post, you will learn how to upload a file and save it on the server so your application can use it and serve the file to the user.
The Yesod devel library already improved a lot during the last years. But still, type safety comes with a drawback sometimes. Since Yesod also secures the static files and how they are included your project, the process can slow down in compile time. We will look at this in this blog post.
Float and Double look very similar. But how to decide which one of them to use in Haskell? Is there a difference in performance? Let's examine this questions.
In this blog post you will learn how to add a simple twitter summary card meta tags to your pages. We will discuss different content types and optional description values as well.
A common task in SEO optimization is adding/configure meta tags. Some of them can improve page ranking. In Yesod, this task is not supported from scratch (like setTitle is). In this post, we will talk about how to add meta tags to your Yesod web project.
To help search engine bots to crawl the content of your web page you can provide a sitemap.xml. In this tutorial you will learn how to create a dynamic sitemap.xml for small (or mid size) pages in Yesod.
Most bigger web projects require different Layouts. This can be special Login-, Landing- or Administration-Pages. In this tutorial you will learn how to organize the Layouts and use them in the Yesod web framework.