In this post, we add more CRUD views to the Pdf Invoice Generator app we have been building using Refine last few days. The resources we cover in this episode are: missions and invoices. We mainly continue leveraging dataProvider methods and adding to the resources prop as well as associated route definitions.
We are on Day Four of #RefineWeek series which is a five-part tutorial that aims to help developers learn the ins-and-outs of Refine's powerful capabilities and get going with Refine within a week.
RefineWeek ft. Strapi series
- Day 1 - Pilot & Refine architecture
- Day 2 - Setting Up the Invoicer App
- Day 3 - Adding CRUD Actions & Views
Overview
On Day 3, we implemented CRUD actions for companies, clients and contacts. We saw that core data hooks such as useCreate() are invoked to access corresponding dataProvider methods (for example, dataProvider.create). And more sophisticated hooks like useSimpleList() are built on top of low level hooks like useList().
We have used some other higher level hooks as well, like useModalForm(), useDrawerForm() and useTable() - all of which combine data fetching and UI presentation with Ant Design components and give us compact and convenient hooks and components to work with.
We covered useTable() on Day 3, and in this post we also use it to list missions and invoices. So, we will be inspecting some low level code to examine how useTable() implements data fetching and UI presentation under the hood. We are going to do the same for useSelect(). We also spend some time digging deep into the <DeleteButton /> component in order to witness how it implements the dataProvider.delete method.
But before we move into writing code, we have to define the collections for missions and invoices in our Strapi app. Let's start with them.
Strapi Collections for missions and invoices
Let's revisit the ERD for our Pdf Invoice Generator app:
We can see from the diagram that invoices have an open one-to-many relation with missions with at least one mission mandatory for an invoice. On the other hand, contacts should have a one-to-many optional relation with invoices.
With this in mind, let's go ahead and create collections in our Strapi app.
Strapi missions Collection
We should use the Content-Type Builder again to define these collections. The missions collection should look like this:
Strapi invoices Collection
The invoices collection should look as below:
invoices has a has one association with companies:
It also has the same has one association with contacts
It also maintains a has many association with missions:
With the collections completed, we should now authorize Authenticated users to perform CRUD operations on them.
Strapi Authorization for Authenticated Role
Like we did before with the companies, clients and contacts collections, we should set permissions for our Authenticated users to access and perform queries and mutations on the /missions and /invoices endpoints.
We can do this from the following path in our Strapi app: /admin/settings/users-permissions/roles/1
We need to set permissions for both missions and invoices.
With these done, now we can head back to our Refine app and add resources and routes for these entities.
Adding resources and Routes for missions and invoices
Back in our App.tsx, let's quickly add the resource objects and route definitions:
Show App.tsx code
import { Authenticated, GitHubBanner, Refine } from "@refinedev/core";
import { RefineKbar, RefineKbarProvider } from "@refinedev/kbar";
import {
AuthPage,
ErrorComponent,
ThemedLayout,
useNotificationProvider,
ThemedTitle,
} from "@refinedev/antd";
import "@refinedev/antd/dist/reset.css";
import * as Icons from "@ant-design/icons";
const {
UserAddOutlined,
TeamOutlined,
InfoCircleOutlined,
SlidersOutlined,
FileAddOutlined,
} = Icons;
import routerBindings, {
CatchAllNavigate,
NavigateToResource,
UnsavedChangesNotifier,
} from "@refinedev/react-router";
import { DataProvider } from "@refinedev/strapi-v4";
import { BrowserRouter, Outlet, Route, Routes } from "react-router-dom";
import { authProvider, axiosInstance } from "./authProvider";
import { Header } from "./components/header";
import { API_URL } from "./constants";
import { ColorModeContextProvider } from "./contexts/color-mode";
import { CompanyList } from "pages/companies";
import { ClientList } from "pages/clients";
import { ContactList, EditContact } from "pages/contacts";
import { MissionList } from "pages/missions";
import { CreateInvoice, EditInvoice, InvoiceList } from "pages/invoices";
function App() {
return (
<BrowserRouter>
<GitHubBanner />
<RefineKbarProvider>
<ColorModeContextProvider>
<Refine
resources={[
{
name: "companies",
list: "/companies",
icon: <InfoCircleOutlined />,
},
{
name: "clients",
list: "/clients",
icon: <TeamOutlined />,
},
{
name: "contacts",
list: "/contacts",
edit: "/contacts/:id/edit",
icon: <UserAddOutlined />,
},
{
name: "missions",
list: "/missions",
icon: <SlidersOutlined />,
},
{
name: "invoices",
list: "/invoices",
create: "/invoices/create",
edit: "invoices/:id/edit",
icon: <FileAddOutlined />,
},
]}
authProvider={authProvider}
dataProvider={DataProvider(API_URL + `/api`, axiosInstance)}
notificationProvider={useNotificationProvider}
routerProvider={routerBindings}
options={{
syncWithLocation: true,
warnWhenUnsavedChanges: true,
}}
>
<Routes>
<Route
element={
<Authenticated fallback={<CatchAllNavigate to="/login" />}>
<ThemedLayout
Header={Header}
Title={({ collapsed }) => (
<ThemedTitleV2 collapsed={collapsed} text="Invoicer" />
)}
>
<Outlet />
</ThemedLayout>
</Authenticated>
}
>
<Route
index
element={<NavigateToResource resource="companies" />}
/>
<Route path="/companies">
<Route index element={<CompanyList />} />
</Route>
<Route path="/clients">
<Route index element={<ClientList />} />
</Route>
<Route path="/contacts">
<Route index element={<ContactList />} />
<Route path="/contacts/:id/edit" element={<EditContact />} />
</Route>
<Route path="/missions">
<Route index element={<MissionList />} />
</Route>
<Route path="/invoices">
<Route index element={<InvoiceList />} />
<Route path="/invoices/create" element={<CreateInvoice />} />
<Route path="/invoices/:id/edit" element={<EditInvoice />} />
</Route>
</Route>
<Route
element={
<Authenticated fallback={<Outlet />}>
<NavigateToResource />
</Authenticated>
}
>
<Route
path="/login"
element={
<AuthPage
type="login"
title={<ThemedTitleV2 collapsed text="Invoicer" />}
formProps={{
initialValues: {
email: "demo@refine.dev",
password: "demodemo",
},
}}
/>
}
/>
</Route>
<Route
element={
<Authenticated>
<ThemedLayout
Header={Header}
Title={({ collapsed }) => (
<ThemedTitleV2 collapsed={collapsed} text="Invoicer" />
)}
>
<Outlet />
</ThemedLayout>
</Authenticated>
}
>
<Route path="*" element={<ErrorComponent />} />
</Route>
</Routes>
<RefineKbar />
<UnsavedChangesNotifier />
</Refine>
</ColorModeContextProvider>
</RefineKbarProvider>
</BrowserRouter>
);
}
export default App;
Adding Views for missions
We only have a list route for missions so let's have a look at what the <MissionList /> component entails.
Refine list View for missions
The <MissionList /> component looks like this:
import {
List,
useTable,
TagField,
useModalForm,
EditButton,
} from "@refinedev/antd";
import { Table } from "antd";
import { IMission } from "interfaces";
import { CreateMission, EditMission } from "components/missions";
export const MissionList: React.FC = () => {
const { tableProps } = useTable<IMission>();
const { formProps, modalProps, show } = useModalForm({
resource: "missions",
action: "create",
});
const {
formProps: editFormProps,
modalProps: editModalProps,
show: editShow,
} = useModalForm({
resource: "missions",
action: "edit",
});
return (
<>
<List
createButtonProps={{
onClick: () => {
show();
},
}}
>
<Table {...tableProps}>
<Table.Column dataIndex="id" title="ID" />
<Table.Column dataIndex="mission" title="Name" />
<Table.Column
dataIndex="mission_description"
title="Mission Description"
/>
<Table.Column dataIndex="day" title="Day(s)" />
<Table.Column
dataIndex="daily_rate"
title="Daily Rate"
render={(value) => <TagField value={value} color="red" />}
/>
<Table.Column<IMission>
title="Total"
render={(_, record) => {
return (
<TagField
value={`${record?.daily_rate * record?.day} $`}
color="green"
/>
);
}}
/>
<Table.Column<IMission>
title="Actions"
dataIndex="actions"
key="actions"
render={(_value, record) => (
<EditButton
hideText
size="small"
recordItemId={record?.id}
onClick={() => editShow(record?.id)}
/>
)}
/>
</Table>
</List>
<CreateMission modalProps={modalProps} formProps={formProps} />
<EditMission modalProps={editModalProps} formProps={editFormProps} />
</>
);
};
The useTable()and useModalForm() hooks are already familiar to us, as we have used them on Day 3. In short, refine-Ant Design's useTable() hook produces for us a set of props inside tableProps which is tailored to match the props accepted by Ant Design's <Table /> component. Similarly, we are picking the formProps object exposed by useModalForm() hook to be passed to the <Form /> component, and also the modalProps to match the props accepted by <Modal /> component.
Towards the end of this post, we dig into some of these hooks' source code and try to make sense of how Refine handles all these for us under the hood.
Refine create View for missions
This is also similar to what we did on Day 3. The create action for missions resource is performed from a <Form /> inside the <CreateMission /> view which is basically built on top of a <Modal /> component.
Thanks to the createButtonProps of the <List /> component, the modal is accessible upon click on a <CreateButton />.
The <CreateMission /> component which accepts and relays formProps to <Form /> and modalProps to the <Modal /> component looks like this:
import { Form, Input, ModalProps, FormProps, Modal, InputNumber } from "antd";
type CreateMissionProps = {
modalProps: ModalProps;
formProps: FormProps;
};
export const CreateMission: React.FC<CreateMissionProps> = ({
modalProps,
formProps,
}) => {
return (
<Modal {...modalProps} title="Create Contact">
<Form {...formProps} layout="vertical">
<Form.Item
label="Title"
name="mission"
rules={[
{
required: true,
},
]}
>
<Input />
</Form.Item>
<Form.Item label="Description" name="mission_description">
<Input />
</Form.Item>
<Form.Item label="Day(s)" name="day">
<InputNumber defaultValue={1} />
</Form.Item>
<Form.Item label="Daily Rate" name="daily_rate">
<InputNumber defaultValue={1} />
</Form.Item>
</Form>
</Modal>
);
};
Refine edit View for missions
The edit view is also similar to the create view. The <EditMission /> component looks like this:
import { Form, Input, ModalProps, FormProps, Modal, InputNumber } from "antd";
type EditMissionProps = {
modalProps: ModalProps;
formProps: FormProps;
};
export const EditMission: React.FC<EditMissionProps> = ({
modalProps,
formProps,
}) => {
return (
<Modal {...modalProps} title="Create Contact">
<Form {...formProps} layout="vertical">
<Form.Item
label="Title"
name="mission"
rules={[
{
required: true,
},
]}
>
<Input />
</Form.Item>
<Form.Item label="Description" name="mission_description">
<Input />
</Form.Item>
<Form.Item label="Day(s)" name="day">
<InputNumber defaultValue={1} />
</Form.Item>
<Form.Item label="Daily Rate" name="daily_rate">
<InputNumber defaultValue={1} />
</Form.Item>
</Form>
</Modal>
);
};
It's render is triggered by a click on the <EditButton /> placed inside a <Table.Column /> element in the <MissionList /> component.
Ok. With these views completed, we should be able to create, list and show missions records from our app.
Adding Views for invoices
For the invoices resource, we have three routes and each path has its own view. Let's start with again with the list.
Refine list View for invoices
The <InvoiceList /> rendered at /invoices looks like this:
Show InvoiceList code
import { useState } from "react";
import { useModal } from "@refinedev/core";
import {
List,
useTable,
DateField,
TagField,
EmailField,
DeleteButton,
EditButton,
} from "@refinedev/antd";
// It is recommended to use explicit import as seen below to reduce bundle size.
// import { IconName } from "@ant-design/icons";
import * as Icons from "@ant-design/icons";
import { Table, Space, Button, Modal } from "antd";
import { IInvoice, IMission } from "interfaces";
// import { PdfLayout } from "components/pdf";
const { FilePdfOutlined } = Icons;
export const InvoiceList: React.FC = () => {
const [record, setRecord] = useState<IInvoice>();
const { tableProps } = useTable<IInvoice>({
meta: {
populate: {
contact: { populate: ["client"] },
company: { populate: ["logo"] },
missions: "*",
},
},
});
const { show, visible, close } = useModal();
return (
<>
<List>
<Table {...tableProps}>
<Table.Column dataIndex="id" title="ID" />
<Table.Column<IInvoice>
dataIndex="name"
title="Invoice Name"
render={(_, record) => {
return `Invoice_#${record.id}${record?.name}`;
}}
/>
<Table.Column<IInvoice>
dataIndex="date"
title="Invoice Date"
render={(value) => <DateField format="LL" value={value} />}
/>
<Table.Column dataIndex={["company", "name"]} title="Company" />
<Table.Column
dataIndex={"missions"}
title="Missions"
render={(value) => {
return value.map((item: IMission) => {
return (
<TagField key={item?.id} color="blue" value={item?.mission} />
);
});
}}
/>
<Table.Column
dataIndex="discount"
title="Discount(%)"
render={(value) => <TagField color="blue" value={value} />}
/>
<Table.Column
dataIndex="tax"
title="Tax(%)"
render={(value) => <TagField color="cyan" value={value} />}
/>
<Table.Column dataIndex="custom_id" title="Custom Invoice ID" />
<Table.Column
dataIndex={["contact", "email"]}
title="Contact"
render={(value) => <EmailField value={value} />}
/>
<Table.Column<IInvoice>
title="Actions"
dataIndex="actions"
render={(_, record) => {
return (
<Space>
<EditButton hideText size="small" recordItemId={record?.id} />
<DeleteButton
hideText
size="small"
recordItemId={record?.id}
/>
</Space>
);
}}
/>
</Table>
</List>
</>
);
};
We already covered useTable() in a couple of more components earlier, but in this instance pay attention to the meta.populate property of the object passed to useTable() hook. We can nest the populate property in order to get deeply associated collections in our query results:
const { tableProps } = useTable<IInvoice>({
meta: {
populate: {
contact: { populate: ["client"] },
company: { populate: ["logo"] },
missions: "*",
},
},
});
Refine create View for invoices
The <CreateInvoice /> page for invoices is accessible from the <CreateButton /> component that is placed inside the refine-Ant Design <List /> component by default.
The <CreateInvoice /> view looks like this:
Show CreateInvoice code
import { Create, useForm, useSelect } from "@refinedev/antd";
import { Form, Input, Select, DatePicker } from "antd";
import { ICompany, IContact, IMission, IInvoice } from "interfaces";
export const CreateInvoice = () => {
const { formProps, saveButtonProps } = useForm<IInvoice>();
const { selectProps: companySelectProps } = useSelect<ICompany>({
resource: "companies",
optionLabel: "name",
pagination: {
mode: "server",
},
});
const { selectProps: contactSelectProps } = useSelect<IContact>({
resource: "contacts",
optionLabel: "first_name",
pagination: {
mode: "server",
},
});
const { selectProps: missionSelectProps } = useSelect<IMission>({
resource: "missions",
optionLabel: "mission",
pagination: {
mode: "server",
},
});
return (
<Create saveButtonProps={saveButtonProps}>
<Form {...formProps} layout="vertical" wrapperCol={{ md: 18, lg: 16 }}>
<Form.Item label="Invoice Name" name="name">
<Input />
</Form.Item>
<Form.Item
label="Company"
name="company"
rules={[
{
required: true,
},
]}
>
<Select {...companySelectProps} />
</Form.Item>
<Form.Item
label="Missions"
name="missions"
rules={[
{
required: true,
},
]}
>
<Select {...missionSelectProps} mode="multiple" />
</Form.Item>
<Form.Item label="Discount(%)" name="discount">
<Input />
</Form.Item>
<Form.Item label="Tax(%)" name="tax">
<Input />
</Form.Item>
<Form.Item label="Custom ID" name="custom_id">
<Input />
</Form.Item>
<Form.Item
label="Contact"
name="contact"
rules={[
{
required: true,
},
]}
>
<Select {...contactSelectProps} />
</Form.Item>
<Form.Item label="Invoice Date" name="date">
<DatePicker style={{ width: "50%" }} />
</Form.Item>
</Form>
</Create>
);
};
There are a couple of things important in the code above. First, the use of <Create /> component, which consumes the saveButtonProps object extracted from the useForm() hook. And secondly, the use of the useSelect() hook. We'll come to useSelect() in the next section about edit view but notice that multiple useSelect() hooks are used to fetch data from the Strapi backend, before they can be added to different fields of the form to create a new invoices entry.
Refine <Create /> Component
The <Create /> component by default places a refine-Ant Design <SaveButton /> component as its child and saveButtonProps are passed to it. saveButtonProps include props for the form action, button loading and disabling states. Here, when the <SaveButton /> is clicked formProps.onFinish() is triggered, which eventually invokes the dataProvider.create method via useCreate().
For the details about how the <SaveButton /> works, feel free to read through the docs here.
Refine edit Views for invoices
The <EditInvoice /> page is more or less the same as the create view. Its content looks as below:
Show EditInvoice code
import { useForm, useSelect, Edit } from "@refinedev/antd";
import { Form, Input, Select } from "antd";
import { IInvoice } from "interfaces";
export const EditInvoice = () => {
const { formProps, saveButtonProps, queryResult } = useForm<IInvoice>({
meta: { populate: ["company", "contact", "missions"] },
});
const defaultValue = queryResult?.data?.data;
const { selectProps: companySelectProps } = useSelect({
resource: "companies",
defaultValue: defaultValue?.company.id,
optionLabel: "name",
pagination: {
mode: "server",
},
});
const { selectProps: contactSelectProps } = useSelect({
resource: "contacts",
defaultValue: defaultValue?.contact?.id,
optionLabel: "first_name",
pagination: {
mode: "server",
},
});
const { selectProps: missionSelectProps } = useSelect({
resource: "missions",
optionLabel: "mission",
pagination: {
mode: "server",
},
});
return (
<Edit saveButtonProps={saveButtonProps}>
<Form {...formProps} layout="vertical" wrapperCol={{ md: 18, lg: 16 }}>
<Form.Item label="Invoice Name" name="name">
<Input />
</Form.Item>
<Form.Item
label="Company"
name={["company", "id"]}
rules={[
{
required: true,
},
]}
>
<Select {...companySelectProps} />
</Form.Item>
<Form.Item
label="Mission"
name={["missions"]}
rules={[
{
required: true,
},
]}
>
<Select {...missionSelectProps} mode="multiple" />
</Form.Item>
<Form.Item label="Discount(%)" name="discount">
<Input />
</Form.Item>
<Form.Item label="Tax(%)" name="tax">
<Input />
</Form.Item>
<Form.Item label="Custom ID" name="custom_id">
<Input />
</Form.Item>
<Form.Item
label="Contact"
name={["contact", "id"]}
rules={[
{
required: true,
},
]}
>
<Select {...contactSelectProps} />
</Form.Item>
</Form>
</Edit>
);
};
This time, the meta.populate property includes multiple associated resources in the query results.
Refine useSelect() Hook
We are using multiple useSelect() hooks that allow us fetch companies, missions and contacts data and avail them to <Form.Item />s. Under the hood, a useSelect() hook counts on the useList() data hook to access and invoke the dataProvider.getList method for fetching data from our Strapi backend. The argument object passed is, therefore, the same as that of useList(). For more details, please see the useSelect() API reference here.
With these components added, we should be able to create, list and edit invoices.
Low Level Inspection
We have used several high level refine-Ant Design hooks so far in this series. Namely, useSimpleList(), useModalForm(), useDrawerForm(), useTable() and useSelect(). Their internal implementations are pretty sophisticated according to the specific requirements they fulfill, both in terms of data fetching and UI presentation.
In the following sections, we zoom in on the low level implementation of useTable(), useSelect() hooks and <CreateButton /> component. This is to shed some light into the tremendous tasks accomplished by Refine hooks and components behind the scenes. This should guide us enough to examine other hooks and components mentioned above. They are available inside the node_modules/@refinedev/antd directory.
refine-Ant Design useTable() Hook
We mentioned that useTable() is built on top of useList(), which is indirectly true. This is because Refine's core module also has a useTable() hook. We are using refine-Ant Design's useTable() hook here, which is actually built on top of the core useTable() hook.
Endowed a due patience, we can see this in action among many others in the @refinedev/antd folder for useTable():
Show useTable source code
const {
tableQuery,
current,
setCurrent,
pageSize,
setPageSize,
filters,
setFilters,
sorters,
setSorters,
sorter,
setSorter,
createLinkForSyncWithLocation,
pageCount,
} = useTableCore<TData, TError>({
permanentSorter,
permanentFilter,
initialCurrent,
initialPageSize,
pagination,
hasPagination,
filters: filtersFromProp,
sorters: sortersFromProp,
initialSorter,
initialFilter,
syncWithLocation,
resource,
defaultSetFilterBehavior,
successNotification,
errorNotification,
queryOptions,
liveMode: liveModeFromProp,
onLiveEvent,
liveParams,
meta: pickNotDeprecated(meta, metaData),
metaData: pickNotDeprecated(meta, metaData),
dataProviderName,
});
Then, it's the core useTable() hook that is leveraging useList() data hook in order to invoke the dataProvider.getList method:
Inside useTable hook
const queryResult = useList<TData, TError>({
resource: resourceInUse,
hasPagination,
pagination: { current, pageSize, mode: pagination?.mode },
filters: unionFilters(preferredPermanentFilters, filters),
sorters: unionSorters(preferredPermanentSorters, sorters),
queryOptions,
successNotification,
errorNotification,
meta: preferredMeta,
metaData: preferredMeta,
liveMode,
liveParams,
onLiveEvent,
dataProviderName,
});
Then, among others inside the gigantic returned object, the tableProps property conforms to the props that are accepted by the Ant Design <Table /> component:
return {
// ...
tableProps: {
dataSource: data?.data,
loading: liveMode === "auto" ? isLoading : !isFetched,
onChange,
pagination: antdPagination(),
scroll: { x: true },
},
// ...
};
refine-Ant Design useSelect() Hook
The useList() hook is also being utilized for the useSelect() refine-Ant Design hook, but inside the core useSelect() hook which then plays its role inside the higher level @refinedev/antd version.
The source code of useSelect() inside @refinedev/antd package uses useSelectCore() in the following snippet:
const { queryResult, defaultValueQueryResult, onSearch, options } =
useSelectCore(props);
return {
selectProps: {
options,
onSearch,
loading: defaultValueQueryResult.isFetching,
showSearch: true,
filterOption: false,
},
queryResult,
defaultValueQueryResult,
};
Inside the core version, useList() is key to fetching data from the backend API:
Show useSelect source code
const queryResult = useList<TData, TError>({
resource,
sorters: pickNotDeprecated(sorters, sort),
filters: filters.concat(search),
pagination: {
current: pagination?.current,
pageSize: pagination?.pageSize ?? fetchSize,
mode: pagination?.mode,
},
hasPagination,
queryOptions: {
...queryOptions,
onSuccess: (data) => {
defaultQueryOnSuccess(data);
queryOptions?.onSuccess?.(data);
},
},
successNotification,
errorNotification,
meta: pickNotDeprecated(meta, metaData),
metaData: pickNotDeprecated(meta, metaData),
liveMode,
liveParams,
onLiveEvent,
dataProviderName,
});
The returned object is tailored to match the props of the Ant Design <Select /> component:
return {
selectProps: {
options,
onSearch,
loading: defaultValueQueryResult.isFetching,
showSearch: true,
filterOption: false,
},
queryResult,
defaultValueQueryResult,
};
refine-Ant Design <DeleteButton />
The <DeleteButton /> implements useDelete directly. In @refinedev/antd v5.1.2, it is invoked like so:
const { mutate, isLoading, variables } = useDelete();
And the returned JSX has a <Popconfirm /> component with an onConfirm prop. The delete mutate function is passed to onConfirm prop, which basically means to invoke dataProvider.delete upon confirmation of a delete pop up:
return (
<Popconfirm
// ...
onConfirm={(): void => {
if ((recordItemId ?? id) && resource?.name) {
mutate(
{
id: recordItemId ?? id ?? "",
resource: resource?.name,
mutationMode,
successNotification,
errorNotification,
meta: pickNotDeprecated(meta, metaData),
metaData: pickNotDeprecated(meta, metaData),
dataProviderName,
invalidates,
},
{
onSuccess: (value) => {
onSuccess && onSuccess(value);
},
},
);
}
}}
// ...
</Popconfirm>
);
As we can see from the above analysis, in the background, Refine handles a lot of data heavy tasks, fine-tunes compatibility with popular stable UI components; and in the foreground, it keeps its hooks and elements highly customizable, compact and elegant.
Summary
In this post, we added CRUD pages for missions and invoices pages in our Pdf Invoice Generator app.
We set off with creating Strapi collections for these resources and setting permissions for authenticated users to access them. We then added the resource objects and route definitions before we built the pages and their partial components.
We discussed in significant depth how higher level hooks like useTable() and useModalForm() provide developer convenience by dealing with data fetching and processing behind the scenes. We then inspect the source code of a couple of these hooks and the <DeleteButton /> to see how the heavy tasks are done.
In the next episode, we add PDF renderer to our app. The PDF renderer will allow users to generate and voew a pdf document for an invoice.