delacruzjames

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

delacruzjames

 React File Structure

delacruzjames

from alembic import op
from alembic.operations.ops import CreatePrimaryKeyOp, CreateForeignKeyOp
import sqlalchemy as sa

def upgrade():

    conn = op.get_bind()
    ctx = op.get_context()
    existing_metadata = sa.schema.MetaData()
    target_metadata = ctx.opts['target_metadata']

delacruzjames

-- Firstly, remove PRIMARY KEY attribute of former PRIMARY KEY
ALTER TABLE <table_name> DROP CONSTRAINT <table_name>_pkey;

-- Then change column name of  your PRIMARY KEY and PRIMARY KEY candidates properly.
ALTER TABLE <table_name> RENAME COLUMN <primary_key_candidate> TO id;

delacruzjames

FROM ruby:2.3.1

# Install dependencies
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs

# Set an environment variable where the Rails app is installed to inside of Docker image:
ENV RAILS_ROOT /var/www/app_name
RUN mkdir -p $RAILS_ROOT

# Set working directory, where the commands will be ran: