Additional columns

If you would like to include a column that does not map directly to a property, you can use the additionalFields field, providing a AdditionalFieldDelegate, which includes an id, a title, and a builder that receives the corresponding entity.

In the builder you can return any React Component.

important

If your additional field depends on the value of another property of the entity you can define the dependencies prop as an array of property keys so that the data is always updated. This will trigger a rerender whenever there is a change in any of the specified property values.

Example

import {
    buildCollection,
    buildCollection,
    AdditionalFieldDelegate
} from "@firecms/cloud";

type User = { name: string }

export const fullNameAdditionalField: AdditionalFieldDelegate<User> = {
    id: "full_name",
    name: "Full Name",
    builder: ({ entity }) => {
        let values = entity.values;
        return typeof values.name === "string" ? values.name.toUpperCase() : "No name provided";
    },
    dependencies: ["name"]
};

const usersCollection = buildCollection<User>({
    path: "users",
    name: "User",
    properties: {
        name: { dataType: "string", name: "Name" }
    },
    additionalFields: [
        fullNameAdditionalField
    ]
});

Advanced example

import {
    buildCollection,
    AdditionalFieldDelegate,
    AsyncPreviewComponent
} from "@firecms/cloud";

export const productAdditionalField: AdditionalFieldDelegate<Product> = {
    id: "spanish_title",
    title: "Spanish title",
    builder: ({ entity, context }) =>
        <AsyncPreviewComponent builder={
            context.dataSource.fetchEntity({
                path: entity.path,
                entityId: entity.id,
                collection: localeSchema
            }).then((entity) => entity.values.name)
        }/>
};

tip

AsyncPreviewComponent is a utility component provided by FireCMS that allows you to render the result of an async computation (such as fetching data from a subcollection, like in this case). It will display a skeleton loading indicator in the meantime.