chore(labs): `Lab4` add tutorial for nestjs app · mdlufy/JavaScript@e79b2c6 · GitHub

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chore(labs): Lab4 add tutorial for nestjs app

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+543-89Lines changed: 543 additions & 89 deletions

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• tutorials/backend
  • README.md
  • example-nestjs/src
    • assets
      • stocks.json
    • file.service.ts
    • stocks
      • stocks.service.ts
  • images
    • delete-by-id.png
    • get-after-delete-by-id.png
    • get-all-after-patch.png
    • get-all-with-query.png
    • get-all.png
    • get-by-id.png
    • get-with-created.png
    • hello-world.png
    • patch-by-id.png
    • post.png
    • sequence-base.png
    • sequence-stock.png

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‎tutorials/backend/README.md‎

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+515-38Lines changed: 515 additions & 38 deletions

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‎tutorials/backend/example-nestjs/src/assets/stocks.json‎

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+6-6Lines changed: 6 additions & 6 deletions

Original file line number	Diff line number	Diff line change
@@ -2,25 +2,25 @@
2	2	{
3	3	"id": 1,
4	4	"src": "https://i.pinimg.com/originals/c9/ea/65/c9ea654eb3a7398b1f702c758c1c4206.jpg",
5		- "title": "Акция",
	5	+ "title": "Акция 1",
6	6	"text": "Такой акции вы еще не видели 1"
7	7	},
8	8	{
9	9	"id": 2,
10	10	"src": "https://i.pinimg.com/originals/c9/ea/65/c9ea654eb3a7398b1f702c758c1c4206.jpg",
11		- "title": "Акция",
	11	+ "title": "Акция 2",
12	12	"text": "Такой акции вы еще не видели 2"
13	13	},
14	14	{
15	15	"id": 3,
16	16	"src": "https://i.pinimg.com/originals/c9/ea/65/c9ea654eb3a7398b1f702c758c1c4206.jpg",
17		- "title": "Акция",
	17	+ "title": "Акция 3",
18	18	"text": "Такой акции вы еще не видели 3"
19	19	},
20	20	{
21		- "id": 5,
	21	+ "id": 4,
22	22	"src": "https://i.pinimg.com/originals/c9/ea/65/c9ea654eb3a7398b1f702c758c1c4206.jpg",
23		- "title": "Акция",
24		- "text": "Такой акции вы еще не видели 5"
	23	+ "title": "Акция 4",
	24	+ "text": "Такой акции вы еще не видели 4"
25	25	}
26	26	]

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‎tutorials/backend/example-nestjs/src/file.service.ts‎

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+1-1Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
@@ -8,7 +8,7 @@ export interface FileAccessor {
8	8
9	9	@Injectable()
10	10	export class FileService<I> {
11		- private readonly filePath = path.resolve(__dirname);
	11	+ protected readonly filePath = path.resolve(__dirname);
12	12
13	13	constructor(filePath?: string) {
14	14	if (filePath) {

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‎tutorials/backend/example-nestjs/src/stocks/stocks.service.ts‎

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+21-44Lines changed: 21 additions & 44 deletions

Original file line number	Diff line number	Diff line change
@@ -10,68 +10,45 @@ export class StocksService {
10	10	constructor(private fileService: FileService<Stock[]>) {}
11	11
12	12	create(createStockDto: CreateStockDto) {
13		- try {
14		- const stocks = this.fileService.read();
	13	+ const stocks = this.fileService.read();
15	14
16		- const stock = { ...createStockDto, id: stocks.length + 2 };
	15	+ // для простоты новый id = текущее количество карточек + 1
	16	+ const stock = { ...createStockDto, id: stocks.length + 1 };
17	17
18		- this.fileService.add(stock);
19		- } catch (e) {
20		- console.error(`Error: ${e}`);
21		- }
	18	+ this.fileService.add(stock);
22	19	}
23	20
24	21	findAll(title?: string): Stock[] {
25		- try {
26		- const stocks = this.fileService.read();
	22	+ const stocks = this.fileService.read();
27	23
28		- return title
29		- ? stocks.filter((stock) =>
30		- stock.title.toLowerCase().includes(title.toLowerCase()),
31		- )
32		- : stocks;
33		- } catch (e) {
34		- console.error(`Error: ${e}`);
35		-
36		- return [];
37		- }
	24	+ return title
	25	+ ? stocks.filter((stock) =>
	26	+ stock.title.toLowerCase().includes(title.toLowerCase()),
	27	+ )
	28	+ : stocks;
38	29	}
39	30
40	31	findOne(id: number): Stock | null {
41		- try {
42		- const stocks = this.fileService.read();
43		-
44		- return stocks.find((stock) => stock.id === id) ?? null;
45		- } catch (e) {
46		- console.error(`Error: ${e}`);
	32	+ const stocks = this.fileService.read();
47	33
48		- return null;
49		- }
	34	+ return stocks.find((stock) => stock.id === id) ?? null;
50	35	}
51	36
52	37	update(id: number, updateStockDto: UpdateStockDto): void {
53		- try {
54		- const stocks = this.fileService.read();
	38	+ const stocks = this.fileService.read();
55	39
56		- const updatedStocks = stocks.map((stock) =>
57		- stock.id === id ? { ...stock, ...updateStockDto } : stock,
58		- );
	40	+ const updatedStocks = stocks.map((stock) =>
	41	+ stock.id === id ? { ...stock, ...updateStockDto } : stock,
	42	+ );
59	43
60		- this.fileService.write(updatedStocks);
61		- } catch (e) {
62		- console.error(`Error: ${e}`);
63		- }
	44	+ this.fileService.write(updatedStocks);
64	45	}
65	46
66	47	remove(id: number): void {
67		- try {
68		- const filteredStocks = this.fileService
69		- .read()
70		- .filter((stock) => stock.id !== id);
	48	+ const filteredStocks = this.fileService
	49	+ .read()
	50	+ .filter((stock) => stock.id !== id);
71	51
72		- this.fileService.write(filteredStocks);
73		- } catch (e) {
74		- console.error(`Error: ${e}`);
75		- }
	52	+ this.fileService.write(filteredStocks);
76	53	}
77	54	}

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‎tutorials/backend/images/delete-by-id.png‎

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