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*https://github.com/angular/angularfire/blob/master/docs/firestore/querying-collections.md
==Collection=Document Fetch===
<pre>
});
}
</pre>
===Document Query===
<pre>
/** Firestore Bookshelf Path */
export const FS_PATH_BOOKSHELF = 'bookshelf/v1/users/';
public getBooksInBookshelfQuery(user: User, sortOrder?:SortOrder, lastBook?:Book): Promise<QuerySnapshot<DocumentData>> {
if (user != null) {
const pagelimit = 100;
const path = `${FS_PATH_BOOKSHELF}${user.uid}/books`;
console.log(`get book in bookshelf..[${path}] order:${sortOrder}`);
console.log(`last book entity is.. ${lastBook}`);
const collection = this.firestore.collection<Book>(path);
let query = collection.ref.limit(pagelimit);
if (sortOrder == 'nameAsc') {
query = query.orderBy('title', 'asc');
if (lastBook) {
console.log(`where title >= ${lastBook.title}`);
query = query
.where('title', '>=', lastBook.title)
.orderBy('updatedAt', 'desc')
.startAfter(lastBook.title, lastBook.updatedAt);
}
} else {
query = query.orderBy('updatedAt', 'desc');
if (lastBook) {
console.log(`where updatedAt <= ${lastBook.updatedAt}`);
query = query
.where('updatedAt', '<=', lastBook.updatedAt)
.orderBy('title', 'asc')
.startAfter(lastBook.updatedAt, lastBook.title);
}
}
return query.get();
}
}
</pre>
<pre>
let outer = this;
this.auth.onAuthStateChanged(async (u) => {
const query = await this.bookService.getBooksInBookshelfQuery(u, sortOrder, lastBook).then();
query.forEach((doc) => {
let book = <Book> doc.data();
book.documentId = doc.id;
outer.books.push(book);
});
});
</pre>
© 2006 矢木浩人
