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command to insert:
r = Rating.create :user_id => 1, :product_id => 1, :description => 'I dont like this shirt', :rating => 2

To run migration:
 bin/rake db:migrate
 
 To create anew migration for adding in reference columns :
 bin/rails generate migration AddUserAndProductToRatings user:references product:references

Create a new model/migration

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db.tweets.updateMany({ {"likes" : null},{$set: {"likes": []}}  })

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db.tweets.findAndModify({query: {"likes" : null},update:{$set: {"likes": []}},new: true, upsert: true   })

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import pandas as pd
import os
import datetime
import numpy as np

#This will be the directory with all the sheets to combine.
questdir = 'C:\Users\chouw\Desktop\Load3'

#chunk of code to verify file count matches.
files = []

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from PIL import Image
from resizeimage import resizeimage
import os
dir = 'C:\Users\chouw\Documents\pictures'
for dirname,subdirlist,flist in os.walk(dir):
    for fname in flist:
        if fname.lower().endswith('.jpg'):
            if os.stat(dir+"\\"+fname).st_size > 3000:
                print "resize {}".format(fname),
                with open(dir+"\\"+fname, 'r+b') as f:

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import os
import csv
import datetime
import timeit
import pandas as pd
import pickle

flcount = 0
addcount = 0
lastadded = 0

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var wrapLog = function (callback, name) {
  //var args = callback.apply(null,arguments);
  //console.log(arguments);
  //console.log(args);
  //console.log(arguments[0]);
  //console.log(arguments);
  return function() {
    //console.log(arguments);
    //console.log(callback.apply(null,arguments));
    //var arg2 = 1, arg1 = 2;