It only takes a minute to sign up. I'm trying to mimic the onload attribute seen here on lightning:recordEditForm but I'm not sure this is possible.
Ideally, I'd like to implement this pattern:. I know that you can fire an event from the child and listen to it on the parent, but I want to listen to it only the context of the onload function to mimic the onload attribute. I also know you can also two-way bind v. But, doing this it's not apparent that something is "loading" inside my child and when it's done to handle the returned value explicitly.
Note: the name of the event and the name of the handler do not need to match; I usually do this for convenience. The name of the aura:registerEvent will be exposed as an "attribute" on the component like in your first section of code. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Onload attribute for new base components - how do we mimic this functionality?
Ask Question. Asked 1 year, 10 months ago. Active 1 year, 10 months ago. Viewed 2k times. Active Oldest Votes. It's recommended that you don't use Aura. Yes, using events is the right way - but it's much less readable because I want to imply readability in the child component when I'm scanning my components.
It is just a method name, its actual name doesn't have any significance. You'd typically use a method with a name like that to listen for the Load event of the Form class. The Winforms designer auto-generates it when you use the lightning bolt icon in the Properties window or when you double-click the form in the designer. But do make it a practice to give the form a good Name first.
Like MainWindow. The Load event fires just before the window becomes visible. It is useful because at that point the real window size and location is accurate, you might want to use it to move or size controls. Or anything else where the window size and location matters.
Implementing the Load event for a Form is an anachronism that dates back to the VB6 days. Events are meant to let code in other classes know what's happening. The Winforms way is to override the OnLoad method instead. The designer favors the VB6 way though. It isn't terribly wrong when you don't derive from the form.
It's the method called when a form is first created and loaded for displayif the method is bound to that event. Note that it can have any name, but the important thing is that it is bound to a form's Load event.
You can change the name of the method, so long it is still bound to the Form's Load event in the Form Designer's auto generated code. Learn more. Asked 9 years, 1 month ago. Active 11 months ago. Viewed 5k times. Active Oldest Votes. Hans Passant Hans Passant k gold badges silver badges bronze badges. Apollo Apollo 97 1 1 silver badge 8 8 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.
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Possible values are public defaultand global.
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Some examples include: cookies used for remarketing, or interest-based advertising. Represents a record edit layout that displays one or more fields, provided by lightning:outputField. This component requires API version Use the lightning:recordEditForm component to create a form that's used to add a Salesforce record or update fields in an existing record.
The component displays fields with their labels and the current values, and enables you to edit their values. If you don't require customizations, use lightning:recordForm instead. To specify editable fields, use lightning:inputField components inside the lightning:recordEditForm component. To display record fields as read-only in lightning:recordEditFormuse lightning:outputField components to specify those fields. You can also use HTML and other display components such as lightning:formattedName to display non-editable content.
This component implements Lightning Data Service and doesn't require additional Apex controllers to create or update record data. Using lightning:recordEditForm to create or update records with Apex controllers can lead to unexpected behaviors. This component also takes care of field-level security and sharing for you, so users see only the data they have access to.
This component doesn't support all Salesforce standard objects. For example, the Event and Task objects are not supported. This limitation also applies to a record that references a field that belongs to an unsupported object. External objects and person accounts are not supported. To work with the User object, specify the FirstName and LastName fields instead of the Name compound field for the fieldName values of lightning:inputField.
For example, entering an invalid email format for the Email field results in an error message when you try to submit the change. Similarly, a required field like the Last Name field displays an error message when you try to submit the change and the field is blank. A Lightning Data Service error is returned when a resource becomes inaccessible on the server or an invalid record ID is passed in, for example. To display the error message automatically, include lightning:messages before or after the lightning:inputField components.
The onload event fires when the form is loaded. An instance of a Record UI is passed in as part of the event. When creating a record, field values are not yet available; however the metadata about the fields is available. Here are some assertions that show where some of the values are located. When editing a record, the field values are available as well as the metadata information.
Note that some field values such as IDs for lookup fields appear in different places as illustrated in the assertions below. A lightning:inputField can be prepopulated with a value by explicitly setting its value attribute. We do have the ability to get field values via the Record UI during the onload and store them in component attributes for use in other events or to display them on the page.
You may also use lightning:outputField within the lightning:recordEditForm and specify that its label should be hidden if you want to output just the value in a metadata aware way. It is worth noting that compound fields such as Name, are passed in as their component parts.
You can add your own values to fields in the component by simply overwriting whatever values is there, or to fields that exist on the object but are not in the component by adding them to the fields object. One use case for the latter, would be to add a parent ID field to a child record, when you do not want the user to be able to select the parent record. This is, obviously, what should be called to submit the form programmatically. The event. To customize the behavior of your form when it loads or when data is submitted, use the onload and onsubmit attributes to specify event handlers.
If you capture the submit event and submit the form programmatically, use event. This prevents a duplicate form submission. It is worth noting, that you do not have to cancel the default behavior and submit programatically. You can just set the fields and the deafult submit behavior will take care of the normal save. The use case for calling submit programmatically is if you do not want to submit under certain conditions. This method would allow you to detect those conditions and then not submit.
Lightning Record Edit Form
Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 1 year ago. Active 2 months ago. Viewed 10k times.
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Active Oldest Votes. Patlatus 9, 4 4 gold badges 39 39 silver badges 88 88 bronze badges. This is the correct answer. The upvoted answer from sanket is incorrect IMHO. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.
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