Note: This article requires basic knowledge of elixir. If you are not familiar with I will encourage you to check the link Ecto is a database abstraction layer for elixir. It provides a domain specific language to interacting with your database. It is also intended for relational database much like Active record. But it share more traits with LINQ in how it generate queries. Ecto in many ways different from ORMs like Active record. Unlike Active record, which uses model as a direct interface to interact with database, Ecto has separate concern for querying (using Query module) and actually perform

We've couple of Ember apps which communicates to single rails API. We were working on making our API more robust for data related operations so we added couple of checks and validations which led us to a thought that it would be even better if we can add validations on our front-end Ember applications. But Ember.js framework doesn't provide validations for models. So we investigated further and we found couple of packages that we can use for model level validations. Ember-model-validator is the one of the most used package for model validations in Ember. It is really easy to

We had a requirement in one of our recent client’s project to provide a lot of file uploading. Being a developer we are quite used to the whole uploading process & the time it takes on the internet. However, file upload can be a daunting experience for a massive amount of users on the internet so, be mindful when you’re working on one. We’ve good experience in building file uploading — By leveraging all those experience our aim was to build a delightful user experience around it. I’ve described below the service & libraries we used to

There are often cross cutting concerns in your app, such as logging, security checkpoints and or maybe business validations. This is a very simple approach of implementing method interceptors in pure javascript. The crux: This decorates all the methods for the given object with before and after interceptions. intercept: function(o) { for (let p in o) { if (typeof o[p] === 'function') { let c = o[p]; o[p] = function() { MIFactory.beforeExecution(o, p); let r = c.call(o, arguments); MIFactory.afterExecution(o, p); return r; } } } return o; } method interceptor factory: MIFactory = { interceptors: [], register: function(interceptor) { MIFactory.interceptors.push(interceptor); }, unregister: function(

CKEditor is a Rich text editor which is used in web applications to write email content, HTML content, templates etc. It provides many features to edit the text like styles, formatting (bold, italic, underline), HTML formatting, alignment options etc. We (QA Team) got a chance to test CKEditor when it was integrated with Realvolve. We created a scenario sheet for each day of testing. We had daily meetings with Dev team to discuss which features from CKEditor are going to deploy for next 1-2 days & on that basis, we created a daily testing plan. For creating scenario sheet, we

In our project, every time we get a new product from a Donor, we use InventoryNumber table to assign inventory_number to that product. InventoryNumber table has just two columns : (id, code). Code is nothing but the inventory_number that needs to be assigned to the product. inventory_number needs to be auto-generated for every product and gets added to the InventoryNumber table once the the product is accepted by one of the admin. Also the interesting part is this inventory_number can also be entered manually by the admins while accepting the product. Suppose we have a new product

It's been more than a year when i started learning knockout.js, now I felt it's time to share my experience with you all what i have learnt so far. As this is my first post on Knockout.js, i am going to introduce you to basics of knockout.js. Knockout is library written in Javascript, which is based on MVVM approach for creating rich and responsive websites Knockout.js become powerful with some of its highlighting features : Dependency Tracking : Knockout automatically identifies the changes and updates the UI. Knockout has observable variables and computed variables that computes the values

Before start to explain, I Know some of you might have greater experience about this word Proxy. what does this really means? Let me explain it through simple example, In our school days when class teacher used to take class attendance and if we found some of our friend missing then we still used to hear from back "yes madam" even though the person called is missing in the class. That is nothing but a proxy attendance, It means answering on behalf of someone and you all know if the proxy person caught up then...........:) Oh,sorry so

CABasicAnimation An object that provides basic, single-keyframe animation capabilities for a layer property. Using init(keyPath:) method of CABasicAnimation you can animated particular the key path of the property. Properties of CABasicAnimation var fromValue: Any? Defines the value the receiver uses to start interpolation. var toValue: Any? Defines the value the receiver uses to end interpolation. var byValue: Any? Defines the value the receiver uses to perform relative interpolation. All properties are optional, and no more than two should be non-nil. The object type should match the type of the property being animated. We can also set duration and repeat

This is part 2 of 'How does Ember Boot?'. If you haven't read 'How does Ember Boot?' part 1 you might consider reading it first. In the last article our main focus was Ember.Application which is sort of static part of Ember boot process. Now we will look into didBecomeReady() and Ember.ApplicationInstance. Which deals with initialization and creation of instances. Ember.Application is called only once but Ember.ApplicationInstance can be n number of times based on number of requests for the instance. In Ember each app instance maintains their own registry/container, so they will