SAILS.JS IN ACTION PDF
Finally, we'll explore Sails custom responses as well as build out an initial requirement . this pivot will encompass the remaining five chapters of ppti.info in. Action. To download their free eBook in PDF, ePub, and Kindle formats, owners. ppti.info in Action is a comprehensive guide to building enterprise-capable web applications using Node and Sails. Written by the creators of the ppti.info framework, this book carefully introduces each concept, technique, and tool with real-world examples and crystal clear. You can share this PDF with anyone you feel could benefit from it, downloaded ppti.info is an MVC (Model View Controller) web framework for ppti.info that . Action routes, which automatically create routes for your custom controller actions .
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Note: Twig and Jinja2 are a common family of templating languages with the same core functionality and features. However, each concrete implementation can have its own small differences and flavors. I will be using the Swig library during the course of this article. It provides a concrete implementation of the Twig and Jinja2 templating syntax for Node.
As I said earlier, Sails delegates view rendering to the Node. I will be using the Swig view engine, which implements support for the Twig and Jinja2 templating languages.
To use it, I will need to complete a few simple steps: Define dependencies and install the Swig package: npm install --save swig.
All you need to do is to set the engine property to swig. Reload the Sails server. Note: In order to see the changes, you will need to reload the application by terminating the server and then lifting it again. An answer on Stack Overflow gives some hints on how this can be automated. The content for all of the changed files are provided below for your reference. I will leave it to you to fix the files yourself.
As you have guessed, Sails can even run without a controller; the routing configuration may specify the view directly, without the need of a controller. We can open this file and introduce a new action for our home page. I will call it index: module. These objects correspond directly to the objects provided by the Express framework. Now, the controller is responsible for handling the request and generating the response. Now, reload the server and refresh the page. You should see the changes.
You can control this behavior by configuring the blueprints component, which can be done in two place.
You can disable action shadow routes for an entire application by setting the actions option to false: module. It was initially designed as a part of the Sails framework and later extracted into a separate Node. Waterline provides an abstraction layer that connects your application to a wide variety of databases transparently and seamlessly. The interesting aspect of Waterline is that it supports related entities between several databases.
For example, you could store users in the PostgreSQL database and related orders in the MongoDB; the abstraction layer would be able to fetch them for you without your even noticing the difference. Suppose we are creating a simple app to manage contacts. Our app will have just two types of entities: a person and their contact information.
The end user would be able to create a person and add multiple contact details for them. Each separate database system that you would use in your Sails project requires a connection specification.
This can be very useful when you are starting to design an app and have not yet selected or deployed a real database server. However, in a real-world scenario, you would need to provide all of the details required to connect to the database system of your choice — for example, the host name, port number, database name, username and so on.
Also, we would need to configure the model layer to use the specified connection by default for each model that we define. The drop could also be a viable option in some cases — then, Sails will just recreate the schema every time the app is lifted.
In a production environment, Sails will use the safe option, which will not make any changes to the schema at all.
Models and blueprints
This really helps with protecting the fragile data in the production database. In safe mode, you will need to execute the migration manually.
Leaving the migrate option undefined is also possible. In this case, Sails will ask you for an interactive choice every time when a migration is required.
Sailing With Sails.js: An MVC-style Framework For Node.js
Now, we are ready to define our models. Just issue these commands: sails generate model person sails generate model contact Sails will create two basic files. To define a many-to-one relationship between two models, we need to use two special properties. Many of these attributes also support customization for instance for validation or uniqueness , depending on the need. As it happens, something crucial is missing from the model in Listing 2. What happens if two blog posts have the same title?
That sounds like the job for an 'integer' attribute, as shown below. Listing 3. For example, Waterline needs to know if the ID is going to be a primary key.
Translated into human language, the above code would say something like: id is an attribute whose type is integer, and the primaryKey meta-attribute is set to true. So enum: ['Fred', 'Barney', 'Wilma', 'Betty'] means only those four values would be acceptable. See the Sails or Waterline documentation for a complete listing of Sails meta-attributes. The simple model above is enough for a basic blog engine.
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Save your BlogEntry. Seriously, go do that before moving on to the next step. Abort, retry, ignore When you issued that sails-lift, you probably had a bit of a shock. Rather than quietly carry on in its merry way, Sails should have immediately sent the following message to your console: Listing 5. However during development, you have a few other options for convenience: 1. I will do it myself by hand 2. Show more Show more icon Now, the first thing you might note is that Sails has some of the most readable error messages ever written.
Because you are doing your first sails lift request with your new BlogEntry data model, Sails asks: What should I do with the schemas if any of the underlying database systems where this model will be stored?
For many developers, this is a moment to pause and think: whereas other ORM systems will have some basic behaviors that require you to edit and manage the database schema by hand, Sails wants to manage those tasks on your behalf. Having this kind of schema migration baked into the environment is pretty nice, at least until it gets in your way or does the wrong thing.
So take a minute to consider your options here, and always be sure to back up your code and data. Fortunately, you can programmatically configure Sails for whatever option you prefer. It makes more sense to do that once the application is further along, however. If you must send text parameters in the body of your request, the easiest way to handle this is by using the built in Cloud SDK that comes with the "Web app" template. This also makes JSON parameters sent alongside file uploads "just work" when they wouldn't without extra work.
As of Parasails v0. Regardless of what you're using on the client side, you'll need to do things a little differently than usual in your Sails action on the back end.
Because we're dealing with a multipart upload, any text parameters in your request body must be sent before any files. This allows Sails to run your action code while files are still uploading, rather than having to wait for them to finish avoiding a famous DDoS vulnerability in Express-based Node.
Sails. Js in Action by Irl Nathan and Mike McNeil (2017, Paperback)
See the Skipper docs for advanced information on how this works behind the scenes.It takes a single argument, the callback function, which will be called when the action completes. Finally, the exec method actually runs the required operations on the underlying database.
However during development, you have a few other options for convenience: 1. Embeds 0 No embeds. Ratings, followers, and search Chapter Getting started Chapter 2. Example: jQuery form 3.
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