/SQL/PG::ForeignKeyViolation: ERROR: update or delete on table violates foreign key constraint

PG::ForeignKeyViolation: ERROR: update or delete on table violates foreign key constraint

has_many :comments, dependent: :delete_all - just automatically delete them when the user is deleted

has_many :comments, dependent: :destroy - like above, but call #destroy on each comment instead of just deleting directly in the db

has_many :comments, dependent: :nullify - don't delete comments when the user is deleted, just null out their user_id column

Similar codes

0 vote210 views1 answer
Postgresql using reserved word as column name
SQL
6 votes197 views1 answer
What is where clause in sql
SQL
16 votes249 views3 answers
Order by sql query
SQL
-1 vote225 views1 answer
An error occurred while installing mysql (2.9.1), and Bundler cannot continue
SQL
0 vote194 views1 answer
Mysql uuid
SQL
0 vote228 views1 answer
Stratified sampling sql
SQL
0 vote185 views1 answer
Fetch second word from a string in ms sql
SQL
0 vote203 views1 answer
Vs 2019 connect to local mysql database
SQL
0 vote205 views1 answer
Query to get all primary keys and foreign key
SQL
0 vote224 views1 answer
C# sql transaction multiple connections
SQL