409 questions
Sorry for the rudimentary question.Connection.group(:user_id) causes Object doesn't support #inspect.Ruby 3.1.0Ruby on Rails 6.1.4 modelclass User<ApplicationRecord has_many —connectionsendclass Co...
I plan to develop a multi-tenant service.It is assumed that each user (service user) will have a direct reference to the database of this service from an external system.We want to separate data sourc...
When I try to ETL the data of s3 to rds in embulk, I get a FOREIGN_KEY constraint error.Specifically, the error is as follows:java.lang.RuntimeException: com.mysql.jdbc.exception.jdbc4.MySQLIntegrityC...
Developing web applications running in rails+mysql environment My PC is an m1 chip macbook, but the mysql container doesn't stand up, so I checked the cause and found out that if you want to use mysql...
The previous question worked well, so I tried to change the table and run it, but it didn't work.What is the cause?package com.example.demo.mysql;import javax.persistence.Column;import javax.persisten...
When I change the value to what I want to update on the edit screen and press the execution button, an error such as No value present appears, so I would like to make this improvement.I am thinking of...
About the image aboveThe parent table is m_productThe child table is t_sales.SELECT m_product.product_code, m_product.product_name, m_product.price, SUM(quantity) as total, SUM(quantity)* price as res...
What do you want to doI want to input data from the seed file into the tableproblems and error messages occurringRails db:seed does not allow data inputI ran create on railsc and checked the contents,...
I'm sorry to disturb you every time.I look forward to working with you again this time.Currently, I deployed Ravel to Sakura VPS and tried to boot it up.SQLSTATE [HY000][2002] Connection refused (SQL:...
What I want to do is implement a like function using asynchronous communication (on the video posting page)As an overview of the portfolio, we separate pages dedicated to posting videos from pages ded...
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