Conditional filtering in Next.js function for fetching posts

export async function getPosts(start: number = 0, end: number = 9, _id?: string) {
	const getPostsQuery = groq`
		// Get posts         That are in the selected category   And order them by published date
		*[_type == "post" && $categoryId in categories[]._ref] | order(publishedDate desc) {
			title,
			slug {
				current
			},
			publishedDate,
			shortDescription,
			cardImage {
				...,
				asset-> {
					...,
				}
			}
		}[$start...$end]
	`

	return client.fetch<GetPostsQueryResult>(
		getPostsQuery,
		{ start, end, categoryId: _id },
		{
			next: {
				tags: ['posts'],
				revalidate: 60,
			},
		}
	)
}

export async function getPosts(start: number = 0, end: number = 9, _id?: string) {
	const getPostsQuery = groq`
		// Get posts         That are in the selected category   And order them by published date
		*[_type == "post" ${_id ? ' && $categoryId in categories[]._ref' : ''}] | order(publishedDate desc) {
			title,
			slug {
				current
			},
			publishedDate,
			shortDescription,
			cardImage {
				...,
				asset-> {
					...,
					metadata {
						...,
					}
				}
			}
		}[$start...$end]
	`

	return client.fetch<GetPostsQueryResult>(
		getPostsQuery,
		{ start, end, categoryId: _id ? _id : 'undefined' },
		{
			next: {
				tags: ['posts'],
				revalidate: 60,
			},
		}
	)
}