[From May 14 to May 20] The things I knew and thought last week

[RDB] The upper size of table name is 64 characters in MySQL 5.6 and 8.0

https://dev.mysql.com/doc/refman/5.6/en/identifier-length.html
https://dev.mysql.com/doc/refman/8.0/en/identifier-length.html

[GORM] belonging to

Foreign key

[GORM] Polymorphism association

[vue] syntax error when I use "esnext" in tsconfig.json

"es2018"

export interface Item {
  name?: string
}

I used this interface const name = item?.name.

[vue]

$ref

[GORM] use where

[GORM] auto preload

[vue] watch object data

watch: {
  'item.name': function(name: string) {
    // do something
  }
}