表rails_project.users不存在：显示用户的完整字段

Question

I have been trying to move my current rails application's db from sqlite to MYSQL. I have made the changes in database.yml file. But its been many times I ran rake:db create and migrate, but nothing does not work for me.

I end up in the error stating "Table 'rails_project.users' doesn't exist: SHOW FULL FIELDS FROM users ".

My db name is rails_project and I am using devise authentication where the table name is users.

I am so frustrated with this issue.

Can anyone help me?

database.yml:

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: rails_project
  pool: 5
  username: root
  password: root
  host : localhost
  socket: /var/run/mysqld/mysqld.sock 
test:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: rails_project
  pool: 5
  username: root
  password: root
  host : localhost
  socket: /var/run/mysqld/mysqld.sock     
production:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: rails_project
  pool: 5
  username: root
  password: root
  host : localhost
  socket: /var/run/mysqld/mysqld.sock 

migrated file:

   class DeviseCreateUsers < ActiveRecord::Migration
    def change
      create_table(:users) do |t|
      ## Database authenticatable
      t.string :email,              :null => false, :default => ""
      t.string :encrypted_password, :null => false, :default => ""

Answer 1

This means that you are trying to use something before define its table, in my case I tried to use some code in factories.rb:

 Assesment.new.questions ...

So when I ran my code on travis during rake db:schema:load all code is interpreted and in that part it got same error, solution is:

• Avoid using a model before define its table

• Use lazy syntax wrapping with { and } , at least in FactoryGirl use

Just tried to read carefully log to see was line of your code is triggering the error