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Oracle Visual Builder: Applications That Outlive Their First Release · Module 7 · Binding data to the page

Binding, and what the framework does for you

Lesson 68 of 176 · 3 min

A value on screen that FOLLOWS A VARIABLE. What updates automatically and what does not, which is THE SOURCE OF MOST "IT DID NOT REFRESH". Module 4 Lesson 1 said the framework watches variables. Binding is the other end of that: the component declares which variable it displays, and the framework keeps them equal. WHAT UPDATES AUTOMATICALLY IS ANY CHANGE THE FRAMEWORK CAN SEE. Assign a new value to a bound variable and every component bound to it re-renders. That is the model working, and it is why nothing in this course ever tells a component to redraw itself. WHAT DOES NOT UPDATE IS A CHANGE THE FRAMEWORK DID NOT WITNESS, AND THAT IS THE WHOLE LESSON. The commonest case is mutating INSIDE a value rather than replacing it — pushing a row onto an array, or setting a property on an object the variable holds. The variable still points…

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In this module: Module 7 · Binding data to the page

  1. 1Binding, and what the framework does for you
  2. 2Tables and lists
  3. 3Forms and two-way binding
  4. 4Formatting: dates, numbers and currency
  5. 5Arabic and right-to-leftFree preview
  6. 6Conditional display
  7. 7Sorting, filtering and searching
  8. 8Empty, loading and error states
  9. 9What breaks: three binding failures
  10. 10Lab briefing · One screen, every state