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/**
* Service API methods that affect multiple records
* @module app/db/service/base/methods
*/
import * as db from "app/db/query";
import { reduceValidColumns } from "app/db/helpers";
import { PERMISSIONS } from "app/constants";
import debugModule from "debug";
/**
* Debug logger
*/
const debug = debugModule("shoebox:service");
/**
* API to query for multiple records by ID
*/
export function showMany(service) {
const { Model, parent, resource } = service;
const { childRelation } = service.options;
const idAttribute = service.idAttributes[0];
return async function showManyMiddleware(request, response, next) {
const { user, permission, body } = request;
const ids = body.map((item) => item[idAttribute]).filter((id) => !!id);
let data;
try {
if (parent) {
// Fetch the immediate parent of the pivot table based on the name of the parent resource.
// This instance is added to the `request.parents` object when performing the permissions check.
const parentInstance = request.parents[parent.resource];
data = await parentInstance
.related(childRelation)
.query((builder) => builder.whereIn(idAttribute, ids));
} else {
data = await db.showIDs({
Model,
ids,
});
}
} catch (error) {
debug(`${resource} Show error`);
debug(error);
return next(error);
}
if (!data) {
response.locals = { data: [] };
next();
} else if (
permission === PERMISSIONS.ALLOW_FOR_OWNER &&
data.some((item) => item.get("user_id") !== user.user_id)
) {
next(new Error("PermissionsError"));
} else {
response.locals = { data };
next();
}
};
}
/**
* API to update multiple records
*/
export function updateMany(service) {
return async function updateManyMiddleware(request, response, next) {
const data = await handleUpdateManyWithTransaction(
service,
request,
response
);
response.locals.data = data;
next();
};
}
/**
* Update multiple records using a transaction
*/
export async function handleUpdateManyWithTransaction(
service,
request,
response
) {
const { Model, idAttributes, columns } = service;
const { bookshelf, privateFields } = service.options;
const idAttribute = idAttributes[0];
return await bookshelf.transaction((transaction) => {
const { data: instances } = response.locals;
const { params, user, permission, body } = request;
const instanceLookup = instances.reduce((lookup, instance) => {
lookup[instance.id] = instance;
return lookup;
}, {});
const promises = body.map((item) => {
const itemId = item[idAttribute];
if (!itemId) {
return handleCreate({
Model,
body: item,
idAttributes,
params,
columns,
privateFields,
transaction,
});
} else if (itemId in instanceLookup) {
return handleUpdate({
instance: instanceLookup[itemId],
body: item,
user,
permission,
columns,
privateFields,
transaction,
});
} else {
throw new Error("item id not found on this record");
}
});
return Promise.all(promises);
});
}
/**
* API to destroy multiple records
*/
export function destroyMany(service) {
const { Model, idAttributes } = service;
const [idAttribute, ...parentIdAttributes] = idAttributes;
return async function destroyManyMiddleware(request, response, next) {
const idsToDelete = request.body[idAttribute];
let instances;
try {
instances = await db.showIDs({ Model, ids: idsToDelete });
instances.forEach((instance) => {
parentIdAttributes.forEach((parentIdAttribute) => {
if (
instance.get(parentIdAttribute) !==
request.params[parentIdAttribute]
) {
throw new Error("parent mismatch");
}
});
});
await Promise.all(instances.map((instance) => instance.destroy()));
} catch (error) {
debug(`${service.resource} destroy many error`);
debug(error);
return next(new Error(error));
}
response.locals.data = instances;
response.locals.success = true;
response.locals.id = idsToDelete;
next();
};
}
/**
* Insert a single record
*/
export function handleCreate({
idAttributes,
params,
columns,
body,
Model,
privateFields,
transaction,
}) {
body = reduceValidColumns(body, columns, privateFields);
if (idAttributes) {
idAttributes.forEach((idAttribute) => {
if (idAttribute in params && idAttribute in columns) {
body[idAttribute] = parseInt(params[idAttribute]);
}
});
}
return db.create({ Model: Model, data: body, transaction });
}
/**
* Update a single record
*/
export function handleUpdate({
instance,
body,
user,
permission,
columns,
privateFields,
transaction,
}) {
if (
permission === PERMISSIONS.ALLOW_FOR_OWNER &&
instance.get("user_id") !== user.user_id
) {
throw new Error("PermissionsError");
}
body = reduceValidColumns(body, columns, privateFields);
return db.update({
instance,
data: body,
transaction,
});
}
|
