Rails Mysql2::Error: Incorrect string value: '\xF0\x9F\x91\x89 I...' for column code example

Example 1: Mysql2::Error: Incorrect string value: '\xE2\x80\x8B

ALTER TABLE your_database_name.your_table CONVERT TO CHARACTER SET utf8

Example 2: Incorrect string value: '\xC4\x81ne' for column

ALTER TABLE table_name CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;