The Basics

The basics of a collection configuration in Umbraco UI Builder, the backoffice UI builder for Umbraco.
There is a lot that can be configured from the collection config, but what follows are the core basics. You can find more configuration options about specific topics from the other configuration sections in the main menu.
Defining a collection
You can define a collection by calling one of the AddCollection methods on a given Tree or parent Folder config builder instance.
AddCollection<TEntityType>(Lambda idFieldExpression, string nameSingular, string namePlural, string description, Lambda collectionConfig = null) : CollectionConfigBuilder<TEntityType>
Adds a collection to the given container with the given names and description and default icons. An ID property accessor expression is required so that Umbraco UI Builder knows which property is the ID property.
// Example
folderConfig.AddCollection<Person>(p => p.Id, "Person", "People", "A collection of people", collectionConfig => {
    ...
});
AddCollection<TEntityType>(Lambda idFieldExpression, string nameSingular, string namePlural, string description, string iconSingular, string iconPlural, Lambda collectionConfig = null) : CollectionConfigBuilder<TEntityType>
Adds a collection to the given container with the given names, description and icons. An ID property accessor expression is required so that Umbraco UI Builder knows which property is the ID property.
// Example
folderConfig.AddCollection<Person>(p => p.Id, "Person", "People", "A collection of people", "icon-umb-users", "icon-umb-users", collectionConfig => {
    ...
});
Changing a collection alias
SetAlias(string alias) : CollectionConfigBuilder<TEntityType>
Sets the alias of the collection.
Optional: When creating a new collection, an alias is automatically generated from the supplied name for you. However, if you need a specific alias you can use the SetAlias method to override this.
// Example
collectionConfig.SetAlias("person");
Changing a collection icon color
SetIconColor(string color) : CollectionConfigBuilder<TEntityType>
Sets the collection icon color to the given color. Possible options are black, green, yellow, orange, blue or red.
// Example
collectionConfig.SetIconColor("blue");
Defining an entity name
Within Umbraco, it is expected that an entity has a name property. So we need to let Umbraco UI Builder know which property to use for the name. If the entity doesn't have a name property, then it needs to know how to construct a name from an entity's other properties. We do this by using either the SetNameProperty or SetNameFormat methods on a Collection config builder instance.
SetNameProperty(Lambda nameProperytyExpression) : CollectionConfigBuilder<TEntityType>
Sets which property of your entity to use as the name property. Property must be of type string. By defining a property as the name property, its value will be used as the label for the entity in trees and list views. It will also be editable in the header region of the editor interface. The property will also automatically be added to the searchable properties collection and be used for the default sort property.
// Example
collectionConfig.SetNameProperty(p => p.Name);
SetNameFormat(Lambda nameFormatExpression) : CollectionConfigBuilder<TEntityType>
Sets a format expression to use to dynamically create a label for the entity in things like trees and list views. By providing a name format it is assumed there is no single name property available on the entity. And as such none of the default behaviors described for the SetNameProperty method will apply.
// Example
collectionConfig.SetNameFormat(p => $"{p.FirstName} {p.LastName}");
Defining a default sort order
SetSortProperty(Lambda sortPropertyExpression) : CollectionConfigBuilder<TEntityType>
Sets which property of our entity to sort against, defaulting to ascending sort direction.
// Example
collectionConfig.SetSortProperty(p => p.FirstName);
SetSortProperty(Lambda sortPropertyExpression, SortDirection sortDirection) : CollectionConfigBuilder<TEntityType>
Sets which property of our entity to sort against in the provided sort direction.
// Example
collectionConfig.SetSortProperty(p => p.FirstName, SortDirection.Descending);
Defining time stamp properties
SetDateCreatedProperty(Lambda dateCreatedProperty) : CollectionConfigBuilder<TEntityType>
Sets which property of our entity to use as the date created property. Property must be of type DateTime. When set and a new entity is saved via the repository, then the given field will be populated with the current date and time.
// Example
collectionConfig.SetDateCreatedProperty(p => p.DateCreated);
SetDateModifiedProperty(Lambda dateCreatedProperty) : CollectionConfigBuilder<TEntityType>
Sets which property of our entity to use as the date modified property. Property must be of type DateTime. When set and an entity is saved via the repository, then the given field will be populated with the current date and time.
// Example
collectionConfig.SetDateModifiedProperty(p => p.DateModified);
Configuring soft deletes
By default, in Umbraco UI Builder any entity that is deleted via the Umbraco UI Builder repository is definitively removed from the system. The SetDeletedProperty method can be used if needed to keep the records in the data repository despite having them marked as deleted. This is so they do not show the the UI.
SetDeletedProperty(Lambda deletedPropertyExpression) : CollectionConfigBuilder<TEntityType>
Sets which property of our entity to use as the deleted property flag. Property must be of type boolean or int. When a deleted property is set, any delete actions will set the deleted flag instead of actualy deleting the entity. For boolean based properties, deleted entities will have a value of True when deleted. For int based properties, deleted entities will have a UTC Unix timestamp value of the date the entity was deleted. In addition, any fetch actions will also pre-filter out any deleted entities.
// Example
collectionConfig.SetDeletedProperty(p => p.Deleted);
Disabling create, update or delete features
DisableCreate() : CollectionConfigBuilder<TEntityType>
Disables the option to create entities on the current collection. An entity could be created via code and only then editing is allowed in the UI for example.
// Example
collectionConfig.DisableCreate();
DisableCreate(Predicate<CollectionPermissionContext> disableExpression) : CollectionConfigBuilder<TEntityType>
Disables the option to create entities on the current collection if the given runtime predicate is true. An entity could be created via code and only then editing is allowed in the UI.
// Example
collectionConfig.DisableCreate(ctx => ctx.UserGroups.Any(x => x.Alias == "editor"));
DisableUpdate() : CollectionConfigBuilder<TEntityType>
Disables the option to update entities on the current collection. An entity can be created, but further editing is not allowed.
// Example
collectionConfig.DisableUpdate();
DisableUpdate(Predicate<CollectionPermissionContext> disableExpression) : CollectionConfigBuilder<TEntityType>
Disables the option to update entities on the current collection if the given runtime predicate is true. An entity can be created, but further editing is not allowed.
// Example
collectionConfig.DisableUpdate(ctx => ctx.UserGroups.Any(x => x.Alias == "editor"));
DisableDelete() : CollectionConfigBuilder<TEntityType>
Disables the option to delete entities on the current collection. Useful if the data needs to be retained and visible. See also configuring soft deletes.
// Example
collectionConfig.DisableDelete();
DisableDelete(Predicate<CollectionPermissionContext> disableExpression) : CollectionConfigBuilder<TEntityType>
Disables the option to delete entities on the current collection if the given runtime predicate is true. Useful if the data needs to be retained and visible. See also configuring soft deletes.
// Example
collectionConfig.DisableDelete(ctx => ctx.UserGroups.Any(x => x.Alias == "editor"));
MakeReadOnly() : CollectionConfigBuilder<TEntityType>
Sets the collection as read-only and disables any Create, Read, Update, and Delete (CRUD) operations from being performed on the collection via the UI.
// Example
collectionConfig.MakeReadOnly();
MakeReadOnly(Predicate<CollectionPermissionContext> disableExpression) : CollectionConfigBuilder<TEntityType>
Sets the collection as read-only if the given runtime predicate is true. It also disables any Create, Read, Update, and Delete (CRUD) operations from being performed on the collection via the UI.
// Example
collectionConfig.MakeReadOnly(ctx => ctx.UserGroups.Any(x => x.Alias == "editor"));
Set the visibility of the collection
SetVisibility(Predicate<CollectionVisibilityContext> visibilityExpression) : CollectionConfigBuilder<TEntityType>
Sets the runtime visibility of the collection.
// Example
collectionConfig.SetVisibility(ctx => ctx.UserRoles.Any(x => x.Alias == "editor"));
Changing a collection connection string
By default, Umbraco UI Builder will use the Umbraco connection string for its database connection. However, you can change this by calling the SetConnectionString method on a Collection config builder instance.
SetConnectionString(string connectionStringName) : CollectionConfigBuilder<TEntityType>
Sets the connection string name for the given collection repository.
// Example
collectionConfig.SetConnectionString("myConnectionStringName");
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