codestates / codestates/Podo

[๐Ÿ‘พ :Error] Sever_Name ์ค‘๋ณต ๊ฒ€์‚ฌ ํ›„ ์žฌ์ƒ์„ฑ

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### **์—๋Ÿฌ๋ฅผ ์ƒ์„ธํžˆ ์ž‘์„ฑํ•˜์„ธ์š”**
์ด Function์˜ ํŠน์ง•์€ ์ค‘๋ณต์ด๋ฉด ์œ ์ €๊ฐ€ ์•„๋‹ˆ๋ผ '์„œ๋ฒ„'์—์„œ ์•Œ์•„์„œ ์žฌ์ƒ์„ฑํ•ด์ค˜์•ผ ํ•œ๋‹ค๋Š” ์ ์ž…๋‹ˆ๋‹ค.
์ด๋Ÿฌํ•œ ํŠน์ง• ๋•Œ๋ฌธ์— while๋ฌธ์ด๋‚˜ ์žฌ๊ท€๋ฅผ ์‚ฌ์šฉํ•ด์ค˜์•ผ ํ•˜๋Š”๋ฐ, ๋‘ ๋ฐฉ๋ฒ• ๋ชจ๋‘ ์‚ฌ์šฉํ•ด๋„ ๋ฌดํ•œ๋ฃจํ”„์— ๋น ์กŒ์Šต๋‹ˆ๋‹ค.

### **์—๋Ÿฌ์˜ ์›์ธ์ด ๋ฌด์—‡์ธ๊ฐ€์š”**
1. let์œผ๋กœ ์ƒ์œ„ ์Šค์ฝ”ํ”„์—์„œ ์„ ์–ธํ•ด์ฃผ๊ณ  ํ•˜์œ„ ์Šค์ฝ”ํ”„์— ๋˜ let์„ ์‚ฌ์šฉํ•˜์—ฌ ์ œ๋Œ€๋กœ while๋ฌธ์ด ์ ์šฉ์ด ๋˜์ง€ ์•Š์•˜์Šต๋‹ˆ๋‹ค.
2. ์ดํ›„ ์žฌ๊ท€๋ฅผ ์‚ฌ์šฉํ–ˆ์Šต๋‹ˆ๋‹ค. ํ•˜์ง€๋งŒ ์ด์ „์— ์ฝ”ํ”Œ๋ฆฟ์—์„œ ๋ฐฐ์› ๋˜ ์ผ๋ฐ˜์ ์ธ ๋ฌธ์ œ์™€ ๋‹ฌ๋ฆฌ sequelize๋กœ DB์—์„œ findAll ์ฒ˜๋ฆฌ๋ฅผ ํ•œ Promise์— ์ ์šฉํ•ด์•ผ ํ•œ๋‹ค๋Š” ์ ์—์„œ ํ—ค๋งธ์Šต๋‹ˆ๋‹ค.
3. ์œ„์˜ ๋ฌธ์ œ๊ฐ€ ๋‹ค ํ•ด๊ฒฐ๋˜๊ณ  ๋‚˜์„œ `ERR_HTTP_HEADERS_SENT`์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ–ˆ๋Š”๋ฐ, promise ํ˜•์‹์œผ๋กœ ๋ฐ”๊พธ๋‹ค๊ฐ€ ํด๋ผ์ด์–ธํŠธ์—๊ฒŒ response๋ฅผ ๋‘๋ฒˆ ๋ณด๋‚ด์„œ ์—๋Ÿฌ๊ฐ€ ๋ฐœ์ƒํ–ˆ์Šต๋‹ˆ๋‹ค.

### **์—๋Ÿฌ๋ฅผ ์–ด๋–ป๊ฒŒ ํ•ด๊ฒฐํ–ˆ๋‚˜์š”**
1. while, ์žฌ๊ท€ ๋ชจ๋‘ ์‹œ๋„ํ•ด๋ณด์•˜์ง€๋งŒ ์ œ๋Œ€๋กœ ๋˜์ง€ ์•Š์•„ ํŒ€์›๋ถ„๋“ค๊ป˜ ๋„์›€์„ ์š”์ฒญํ–ˆ์Šต๋‹ˆ๋‹ค. validate ํ•จ์ˆ˜์—์„œ๋Š” BOOLEAN์œผ๋กœ ๊ฒฐ๊ณผ๊ฐ’์„ ์ฃผ๊ณ , ๊ทธ ๊ฒฐ๊ณผ๊ฐ’์„ ํ™œ์šฉํ•ด while๋ฌธ์„ ์‚ฌ์šฉํ•˜๋ผ๋Š” ์กฐ์–ธ์„ ๋ฐ›์•˜์Šต๋‹ˆ๋‹ค. ์ด๋ฏธ ํ•ด๋ดค๋˜ ๋ฐฉ์‹์ด๋ผ๊ณ  ์ƒ๊ฐํ–ˆ์ง€๋งŒ, ํŒ€์›๋ถ„๋“ค ๋•๋ถ„์— let์„ ์ž˜๋ชป ์‚ฌ์šฉํ–ˆ๋‹ค๋Š” ์ ์„ ์ธ์ง€ํ•˜๊ณ  ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•  ์ˆ˜ ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค. ํ•˜์œ„ ์Šค์ฝ”ํ”„์—์„œ let์„ ๋นผ์ฃผ์–ด์„œ ํ•ด๊ฒฐํ•  ์ˆ˜ ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค.
2. `.then`์„ ์‚ฌ์šฉํ•˜์—ฌ ํ•ด๊ฒฐํ•˜์˜€์Šต๋‹ˆ๋‹ค.
3. ํ•œ๋ฒˆ๋งŒ response๋ฅผ ๋ณด๋‚ด๋Š” ํ˜•์‹์œผ๋กœ ๋ฐ”๊ฟจ์Šต๋‹ˆ๋‹ค.

### **๊ฒ€์ƒ‰ ํ‚ค์›Œ๋“œ์™€ ๋„์›€์ด ๋œ ๋ ˆํผ๋Ÿฐ์Šค๋ฅผ ์ž‘์„ฑํ•˜์„ธ์š”**
๋ณด๋ผ๋‹˜, ํƒœ์šฐ๋‹˜, ์›๊ตฌ๋‹˜

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