wip

Author: stephenh

graphql-codegen-joist.js

@@ -1,4 +1,9 @@
-const mappers = { Author: "src/entities#Author", Book: "src/entities#Book" };
+const mappers = {
+  Author: "src/entities#Author",
+  Book: "src/entities#Book",
+  BookReview: "src/entities#BookReview",
+  Reviewer: "src/entities#Reviewer",
+};
 
 const enumValues = {};
 

joist-config.json

@@ -1,5 +1,10 @@
 {
   "codegenPlugins": ["joist-graphql-codegen"],
-  "entities": { "Author": { "tag": "a" }, "Book": { "tag": "b" } },
+  "entities": {
+    "Author": { "fields": { "numberOfReviews": { "derived": "async" } }, "tag": "a" },
+    "Book": { "tag": "b" },
+    "BookReview": { "tag": "br" },
+    "Reviewer": { "tag": "r" }
+  },
   "entitiesDirectory": "./src/entities"
 }

migrations/1681584320109_add-book-reviews.ts

@@ -0,0 +1,10 @@
+import { MigrationBuilder } from "node-pg-migrate";
+import { createEntityTable, foreignKey } from "joist-migration-utils";
+
+export async function up(b: MigrationBuilder): Promise<void> {
+  // Add book reviews
+  createEntityTable(b, "book_reviews", {
+    book_id: foreignKey("books", { notNull: true }),
+    rating: { type: "integer", notNull: true },
+  });
+}

migrations/1681667270236_add-reviewer.ts

@@ -0,0 +1,14 @@
+import { MigrationBuilder } from "node-pg-migrate";
+import { createEntityTable, addColumns, foreignKey } from "joist-migration-utils";
+
+export async function up(b: MigrationBuilder): Promise<void> {
+  // Keep track of who is making reviews
+  createEntityTable(b, "reviewers", {
+    name: { type: "text", notNull: true },
+    age: { type: "integer", notNull: true },
+  });
+  // Assume we don't have any reviews in the database yet
+  addColumns(b, "book_reviews", {
+    reviewer_id: foreignKey("reviewers", { notNull: true }),
+  });
+}

migrations/1681683995698_store-number-of-reviews.ts

@@ -0,0 +1,9 @@
+import { MigrationBuilder } from "node-pg-migrate";
+import { addColumns } from "joist-migration-utils";
+
+export async function up(b: MigrationBuilder): Promise<void> {
+  // Given the datalake easy access to our business logic
+  addColumns(b, "authors", {
+    number_of_reviews: { type: "int", notNull: true, default: 0 },
+  });
+}

schema/.history.json

@@ -1,9 +1,15 @@
 {
-  "Author": ["books", "createdAt", "firstName", "id", "lastName", "updatedAt"],
-  "Book": ["author", "createdAt", "id", "title", "updatedAt"],
-  "Mutation": ["saveAuthor", "saveBook"],
-  "SaveAuthorInput": ["firstName", "id", "lastName"],
+  "Author": ["books", "createdAt", "firstName", "id", "lastName", "numberOfReviews", "updatedAt"],
+  "Book": ["author", "createdAt", "id", "reviews", "title", "updatedAt"],
+  "BookReview": ["book", "createdAt", "id", "rating", "reviewer", "updatedAt"],
+  "Mutation": ["saveAuthor", "saveBook", "saveBookReview", "saveReviewer"],
+  "Reviewer": ["age", "bookReviews", "createdAt", "id", "name", "updatedAt"],
+  "SaveAuthorInput": ["firstName", "id", "lastName", "numberOfReviews"],
   "SaveAuthorResult": ["author"],
   "SaveBookInput": ["authorId", "id", "title"],
-  "SaveBookResult": ["book"]
+  "SaveBookResult": ["book"],
+  "SaveBookReviewInput": ["bookId", "id", "rating", "reviewerId"],
+  "SaveBookReviewResult": ["bookReview"],
+  "SaveReviewerInput": ["age", "id", "name"],
+  "SaveReviewerResult": ["reviewer"]
 }

schema/author.graphql

@@ -1,4 +1,5 @@
 extend type Query {
+  authors: [Author!]!
   author(id: ID!): Author!
 }
 
@@ -12,12 +13,15 @@ type Author {
   firstName: String!
   lastName: String
   books: [Book!]!
+  publicReviews: [BookReview!]!
+  numberOfReviews: Int!
 }
 
 input SaveAuthorInput {
   id: ID
   firstName: String
   lastName: String
+  numberOfReviews: Int
 }
 
 type SaveAuthorResult {

schema/book.graphql

@@ -6,6 +6,7 @@ type Book {
   id: ID!
   title: String!
   author: Author!
+  reviews: [BookReview!]!
 }
 
 input SaveBookInput {

schema/bookReview.graphql

@@ -0,0 +1,22 @@
+extend type Mutation {
+  saveBookReview(input: SaveBookReviewInput!): SaveBookReviewResult!
+}
+
+type BookReview {
+  id: ID!
+  rating: Int!
+  book: Book!
+  reviewer: Reviewer!
+  isPublic: Boolean!
+}
+
+input SaveBookReviewInput {
+  id: ID
+  rating: Int
+  bookId: ID
+  reviewerId: ID
+}
+
+type SaveBookReviewResult {
+  bookReview: BookReview!
+}

schema/reviewer.graphql

@@ -0,0 +1,20 @@
+extend type Mutation {
+  saveReviewer(input: SaveReviewerInput!): SaveReviewerResult!
+}
+
+type Reviewer {
+  id: ID!
+  name: String!
+  age: Int!
+  bookReviews: [BookReview!]!
+}
+
+input SaveReviewerInput {
+  id: ID
+  name: String
+  age: Int
+}
+
+type SaveReviewerResult {
+  reviewer: Reviewer!
+}