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userbase/app/src/ui/modules/data/components/schema/create-modal/step.relation.tsx
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shishantbiswas 282c9f6054
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fix: on delete
2026-09-27 17:57:45 +05:30

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TypeScript

import { Switch, TextInput } from "@mantine/core";
import { IconDatabase } from "@tabler/icons-react";
import {
DEFAULT_RELATION_CASCADE,
ManyToOneRelation,
type RelationType,
RelationCascades,
RelationTypes,
} from "data/relations";
import type { ReactNode } from "react";
import { type Control, type FieldValues, type UseFormRegister, useForm } from "react-hook-form";
import { TbRefresh } from "react-icons/tb";
import { useBknd } from "ui/client/bknd";
import { Button } from "ui/components/buttons/Button";
import { MantineNumberInput } from "ui/components/form/hook-form-mantine/MantineNumberInput";
import { MantineSelect } from "ui/components/form/hook-form-mantine/MantineSelect";
import { useStepContext } from "ui/components/steps/Steps";
import { useEvent } from "ui/hooks/use-event";
import { ModalBody, ModalFooter } from "./CreateModal";
import type { TCreateModalSchema } from "./schema";
import { s, stringIdentifier } from "bknd/utils";
import { standardSchemaResolver } from "@hookform/resolvers/standard-schema";
const Relations: {
type: RelationType;
label: string;
component: (props: ComponentCtx<any>) => ReactNode;
}[] = [
{
type: RelationTypes.ManyToOne,
label: "Many to One",
component: ManyToOne,
},
{
type: RelationTypes.OneToOne,
label: "One to One",
component: OneToOne,
},
{
type: RelationTypes.ManyToMany,
label: "Many to Many",
component: ManyToMany,
},
{
type: RelationTypes.Polymorphic,
label: "Polymorphic",
component: Polymorphic,
},
];
const schema = s.strictObject({
type: s.string({ enum: Relations.map((r) => r.type) }),
source: stringIdentifier,
target: stringIdentifier,
config: s.object({
on_delete: s.string({ enum: RelationCascades }).optional(),
}),
});
type ComponentCtx<T extends FieldValues = FieldValues> = {
register: UseFormRegister<T>;
control: Control<T>;
data: T;
};
export function StepRelation() {
const { config } = useBknd();
const entities = config.data.entities;
const count = Object.keys(entities ?? {}).length;
const { nextStep, stepBack, state, path, setState } = useStepContext<TCreateModalSchema>();
const {
register,
handleSubmit,
formState: { isValid },
setValue,
watch,
control,
} = useForm({
resolver: standardSchemaResolver(schema),
defaultValues: (state.relations?.create?.[0] ?? {}) as s.Static<typeof schema>,
});
const data = watch();
function handleNext() {
if (isValid) {
setState((prev) => {
return {
...prev,
relations: {
create: [data],
},
};
});
console.log("data", data);
nextStep("create")();
}
}
const flip = useEvent(() => {
const { source, target } = data;
if (source && target) {
setValue("source", target);
setValue("target", source);
} else {
if (source) {
setValue("target", source);
setValue("source", null as any);
} else {
setValue("source", target);
setValue("target", null as any);
}
}
});
return (
<>
{count < 2 && (
<div className="px-5 py-4 bg-red-100 text-red-900">
Not enough entities to create a relation.
</div>
)}
<form onSubmit={handleSubmit(handleNext)}>
<ModalBody>
<div className="grid grid-cols-3 gap-8">
<MantineSelect
control={control}
name="source"
label="Source"
allowDeselect={false}
data={Object.entries(entities ?? {}).map(([name, entity]) => ({
value: name,
label: entity.config?.name ?? name,
disabled: data.target === name,
}))}
/>
<div className="flex flex-col gap-1">
<MantineSelect
control={control}
name="type"
onChange={() => setValue("config", {})}
label="Relation Type"
data={Relations.map((r) => ({ value: r.type, label: r.label }))}
allowDeselect={false}
/>
{data.type && (
<div className="flex justify-center mt-1">
<Button size="small" IconLeft={TbRefresh} onClick={flip}>
Flip entities
</Button>
</div>
)}
</div>
<MantineSelect
control={control}
allowDeselect={false}
name="target"
label="Target"
data={Object.entries(entities ?? {}).map(([name, entity]) => ({
value: name,
label: entity.config?.name ?? name,
disabled: data.source === name,
}))}
/>
</div>
<div>
{data.type &&
Relations.find((r) => r.type === data.type)?.component({
register,
control,
data,
})}
</div>
</ModalBody>
<ModalFooter
next={{
type: "submit",
disabled: !isValid,
onClick: handleNext,
}}
prev={{ onClick: stepBack }}
debug={{ state, path, data }}
/>
</form>
</>
);
}
const Pre = ({ children }: { children: ReactNode }) => (
<b className="font-mono select-text">{children}</b>
);
const Callout = ({ children }: { children: ReactNode }) => (
<div className="bg-primary/5 py-4 px-5 rounded-lg mt-10">{children}</div>
);
function OnDelete({
control,
label = "On target delete",
}: {
control: Control<any>;
label?: string;
}) {
return (
<MantineSelect
control={control}
name="config.on_delete"
label={label}
allowDeselect={false}
defaultValue={DEFAULT_RELATION_CASCADE}
data={RelationCascades.map((cascade) => ({ value: cascade, label: cascade }))}
/>
);
}
function ManyToOne({ register, control, data: { source, target, config } }: ComponentCtx) {
return (
<>
<div className="grid grid-cols-3 gap-8">
<div className="flex flex-col gap-4">
<TextInput
label="Target mapping"
{...register("config.mappedBy")}
placeholder={target}
/>
<MantineNumberInput
label="Cardinality"
name="config.sourceCardinality"
control={control}
placeholder="n"
/>
<MantineNumberInput
label="WITH limit"
name="config.with_limit"
control={control}
placeholder={String(ManyToOneRelation.DEFAULTS.with_limit)}
/>
<OnDelete control={control} />
</div>
<div />
<div className="flex flex-col gap-4">
<TextInput
label="Source mapping"
{...register("config.inversedBy")}
placeholder={source}
/>
<Switch label="Required" {...register("config.required")} />
</div>
</div>
{source && target && config && (
<Callout>
<pre className="mb-2 opacity-70 flex flex-row items-center gap-2">
<IconDatabase className="size-4" />
{source}.{config.mappedBy || target}_id {"→"} {target}
</pre>
<p>
Many <Pre>{source}</Pre> will each have one reference to <Pre>{target}</Pre>.
</p>
<p>
A property <Pre>{config.mappedBy || target}_id</Pre> will be added to{" "}
<Pre>{source}</Pre> (which references <Pre>{target}</Pre>).
</p>
<p>
When creating <Pre>{source}</Pre>, a reference to <Pre>{target}</Pre> is{" "}
<i>{config.required ? "required" : "optional"}</i>.
</p>
<p>
If a <Pre>{target}</Pre> entry is deleted, the reference is{" "}
<i>{config.on_delete ?? DEFAULT_RELATION_CASCADE}</i>.
</p>
{config.sourceCardinality ? (
<p>
<Pre>{target}</Pre> should not have more than{" "}
<Pre>{config.sourceCardinality}</Pre> referencing entr
{config.sourceCardinality === 1 ? "y" : "ies"} to <Pre>{source}</Pre>.
</p>
) : null}
</Callout>
)}
</>
);
}
function OneToOne({
register,
control,
data: {
source,
target,
config: { mappedBy, required, on_delete },
},
}: ComponentCtx) {
return (
<>
<div className="grid grid-cols-3 gap-8">
<div className="flex flex-col gap-4">
<TextInput
label="Target mapping"
{...register("config.mappedBy")}
placeholder={target}
/>
<Switch label="Required" {...register("config.required")} />
<OnDelete control={control} />
</div>
<div />
<div className="flex flex-col gap-4">
<TextInput
label="Source mapping"
{...register("config.inversedBy")}
placeholder={source}
/>
</div>
</div>
{source && target && (
<Callout>
<pre className="mb-2 opacity-70 flex flex-row items-center gap-2">
<IconDatabase className="size-4" />
{source}.{mappedBy || target}_id {"↔"} {target}
</pre>
<p>
A single entry of <Pre>{source}</Pre> will have a reference to <Pre>{target}</Pre>
.
</p>
<p>
A property <Pre>{mappedBy || target}_id</Pre> will be added to <Pre>{source}</Pre>{" "}
(which references <Pre>{target}</Pre>).
</p>
<p>
When creating <Pre>{source}</Pre>, a reference to <Pre>{target}</Pre> is{" "}
<i>{required ? "required" : "optional"}</i>.
</p>
<p>
If a <Pre>{target}</Pre> entry is deleted, the reference is{" "}
<i>{on_delete ?? DEFAULT_RELATION_CASCADE}</i>.
</p>
</Callout>
)}
</>
);
}
function ManyToMany({ register, control, data: { source, target, config } }: ComponentCtx) {
const table = config.connectionTable
? config.connectionTable
: source && target
? `${source}_${target}`
: "";
return (
<>
<div className="grid grid-cols-3 gap-8">
<div className="flex flex-col gap-4">
{/*<TextInput
label="Target mapping"
{...register("config.mappedBy")}
placeholder={target}
/>*/}
</div>
<div className="flex flex-col gap-4">
<TextInput
label="Connection Table"
{...register("config.connectionTable")}
placeholder={table}
/>
<TextInput
label="Connection Mapping"
{...register("config.connectionTableMappedName")}
placeholder={table}
/>
<OnDelete control={control} label="On delete (both references)" />
</div>
<div className="flex flex-col gap-4">
{/*<TextInput
label="Source mapping"
{...register("config.inversedBy")}
placeholder={source}
/>*/}
</div>
</div>
{source && target && (
<Callout>
<pre className="mb-2 opacity-70 flex flex-row items-center gap-2">
<IconDatabase className="size-4" />
{source} {"→"} {table} {"←"} {target}
</pre>
<p>
Many <Pre>{source}</Pre> will have many <Pre>{target}</Pre>.
</p>
<p>
A connection table <Pre>{table}</Pre> will be created to store the relations.
</p>
<p>
If an entry of <Pre>{source}</Pre> or <Pre>{target}</Pre> is deleted, the
connection is <i>{config.on_delete ?? DEFAULT_RELATION_CASCADE}</i>.
</p>
</Callout>
)}
</>
);
}
function Polymorphic({ register, control, data: { type, source, target, config } }: ComponentCtx) {
return (
<>
<div className="grid grid-cols-3 gap-8" key={type}>
<div className="flex flex-col gap-4">
<TextInput
label="Target mapping"
{...register("config.mappedBy")}
placeholder={target}
/>
</div>
<div />
<div className="flex flex-col gap-4">
<TextInput
label="Source mapping"
{...register("config.inversedBy")}
placeholder={source}
/>
<MantineNumberInput
label="Cardinality"
name="config.targetCardinality"
control={control}
placeholder="n"
/>
</div>
</div>
{source && target && (
<Callout>
<pre className="mb-2 opacity-70 flex flex-row items-center gap-2">
<IconDatabase className="size-4" />
{source} {"←"} {target}
</pre>
<p>
<Pre>{source}</Pre> will have many <Pre>{target}</Pre>.
</p>
<p>
<Pre>{target}</Pre> will get additional properties <Pre>reference</Pre> and{" "}
<Pre>entity_id</Pre> to make the (polymorphic) reference.
</p>
{config.targetCardinality ? (
<p>
<Pre>{source}</Pre> should not have more than{" "}
<Pre>{config.targetCardinality}</Pre> reference
{config.targetCardinality === 1 ? "" : "s"} to <Pre>{target}</Pre>.
</p>
) : null}
</Callout>
)}
</>
);
}