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MongoDB-Project2- Extra Credit 1.py
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MongoDB-Project2- Extra Credit 1.py
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# Extra Credit -1
# Student ID - 1001781008 Name - Pankaj Walke
# Student ID - 1001751987 Name - Shivam Kumar Sareen
import lxml.etree as ET
from xml.etree import ElementTree
from xml.dom import minidom
import csv
import json
from pymongo import MongoClient
import mysql.connector
mydb = mysql.connector.connect(
host="localhost",
user="root",
password="tiger"
)
# Table sequence - Department -> Dept_loc -> Employee -> Project -> WorksOn
#Reference- https://gist.github.com/Averroes/6375a1cccd39fe9f2dd7
def prettify(elem):
"""Return a pretty-printed XML string for the Element.
"""
rough_string = ElementTree.tostring(elem, 'utf-8')
reparsed = minidom.parseString(rough_string)
return reparsed.toprettyxml(indent=" ")
dbcursor = mydb.cursor()
dbcursor.execute("CREATE DATABASE IF NOT EXISTS company")
dbcursor.execute("use company")
dbcursor.execute("DROP TABLE IF EXISTS company.works_on")
dbcursor.execute("DROP TABLE IF EXISTS company.project")
dbcursor.execute("DROP TABLE IF EXISTS company.employee")
dbcursor.execute("DROP TABLE IF EXISTS company.dept_loc")
dbcursor.execute("DROP TABLE IF EXISTS company.department")
mydb.commit()
# Create Department Table--------------------------------
createdept = "CREATE TABLE IF NOT EXISTS company.department (DName VARCHAR(45) NOT NULL," \
"DNum INT NOT NULL," \
"ManagerSSN INT NULL," \
"ManagerStartDt VARCHAR(45) NULL)"
dbcursor.execute(createdept)
mydb.commit()
print("\n************************************ Table Dept created************************************")
csvfile = open('Input/DEPARTMENT.csv', 'r')
insertdept = "INSERT INTO company.department (DName, DNum, ManagerSSN, ManagerStartDt) VALUES (%s, %s, %s,%s)"
for row in csvfile:
val = tuple(row.rstrip('\n').replace("'", '').split(','))
dbcursor.execute(insertdept, val)
mydb.commit()
# mydb.commit()
print("\n************************************Values inserted in Dept Table************************************")
# Create Employee Table--------------------------------
createemp = "CREATE TABLE IF NOT EXISTS company.employee (`EFname` VARCHAR(45) NOT NULL," \
" `EMiddle` VARCHAR(45) NULL," \
"`ELname` VARCHAR(45) NULL," \
"`ESSN` VARCHAR(45) NOT NULL," \
"`EDOB` VARCHAR(45) NOT NULL," \
"`EAddress` VARCHAR(45) NOT NULL," \
"`Sex` CHAR(1) NOT NULL," \
"`ESalary` INT NULL," \
"`SupSSN` VARCHAR(45) NULL," \
"`EDeptNo` INT NULL," \
"PRIMARY KEY (`ESSN`))"
dbcursor.execute(createemp)
mydb.commit()
print("\n************************************Table Emp created************************************")
csvfile = open('Input/EMPLOYEE.csv', 'r')
insertemp = "INSERT INTO company.employee (EFname, EMiddle, ELname, ESSN, EDOB, EAddress, Sex, ESalary, SupSSN, EDeptNo) VALUES (%s, %s, %s,%s, %s, %s, %s, %s, %s, %s)"
for row in csvfile:
EFname = row.rstrip('\n').replace("'", '').split(',')[0]
EMiddle = row.rstrip('\n').replace("'", '').split(',')[1]
ELname = row.rstrip('\n').replace("'", '').split(',')[2]
ESSN = row.rstrip('\n').replace("'", '').split(',')[3]
EDOB = row.rstrip('\n').replace("'", '').split(',')[4]
EAddress = row.rstrip('\n').replace("'", '').split(',')[5] +" "+ row.rstrip('\n').replace("'", '').split(',')[6] +" "+ row.rstrip('\n').replace("'", '').split(',')[7]
Sex = row.rstrip('\n').replace("'", '').split(',')[8]
ESalary = row.rstrip('\n').replace("'", '').split(',')[9]
SupSSN = row.rstrip('\n').replace("'", '').split(',')[10]
EDeptNo = row.rstrip('\n').replace("'", '').split(',')[11]
dbcursor.execute(insertemp, (EFname, EMiddle, ELname, ESSN, EDOB, EAddress, Sex, ESalary, SupSSN, EDeptNo))
mydb.commit()
# mydb.commit()
print("\n************************************Values inserted in Emp Table************************************")
# Create Project Table--------------------------------
createproject = "CREATE TABLE IF NOT EXISTS company.project (" \
" `PName` varchar(45) NOT NULL," \
"`PNo` int NOT NULL," \
"`PLocation` varchar(45) DEFAULT NULL," \
"`PDeptNo` int DEFAULT NULL ," \
"PRIMARY KEY (`PNo`))"
# "KEY `DNum_idx` (`PDeptNo`)," \
# "FOREIGN KEY (`PDeptNo`) REFERENCES `department` (`DNum`))"
dbcursor.execute(createproject)
mydb.commit()
print("\n************************************ Table Project created************************************")
csvfile = open('Input/PROJECT.csv', 'r')
insertproject = "INSERT INTO company.project (PName, PNo, PLocation, PDeptNo) VALUES (%s, %s, %s,%s)"
for row in csvfile:
val = tuple(row.rstrip('\n').replace("'", '').split(','))
dbcursor.execute(insertproject, val)
mydb.commit()
print("\n************************************Values inserted in Project Table************************************")
# Create Department Location Table--------------------------------
createdept_loc = "CREATE TABLE IF NOT EXISTS company.dept_loc (" \
"`DNum` INT NOT NULL," \
"`DLocation` VARCHAR(45) NOT NULL)"
# "KEY `DNum_idx` (`PDeptNo`)," \
# "FOREIGN KEY (`PDeptNo`) REFERENCES `department` (`DNum`))"
dbcursor.execute(createdept_loc)
mydb.commit()
print("\n************************************ Table Dept_Location created************************************")
csvfile = open('Input/DEPT_LOCATIONS.csv', 'r')
insertdept_loc = "INSERT INTO company.dept_loc (DNum, DLocation) VALUES (%s, %s)"
for row in csvfile:
val = tuple(row.rstrip('\n').replace("'", '').split(','))
dbcursor.execute(insertdept_loc, val)
mydb.commit()
# mydb.commit()
print("\n************************************Values inserted in Dept_Location Table************************************")
# Create Works_On Table--------------------------------
createworks_on = "CREATE TABLE IF NOT EXISTS company.works_on (" \
"`EmpSSN` CHAR(9) NOT NULL," \
"`PNum` INT NOT NULL," \
"`Hours` FLOAT NULL)"
# "KEY `DNum_idx` (`PDeptNo`)," \
# "FOREIGN KEY (`PDeptNo`) REFERENCES `department` (`DNum`))"
dbcursor.execute(createworks_on)
mydb.commit()
print("\n************************************Table WorksOn created************************************")
csvfile = open('Input/WORKS_ON.csv', 'r')
insertworks_on = "INSERT INTO company.works_on (EmpSSN, PNum, Hours) VALUES (%s, %s, %s)"
for row in csvfile:
val = tuple(row.rstrip('\n').replace("'", '').split(','))
dbcursor.execute(insertworks_on, val)
mydb.commit()
# mydb.commit()
print("\n************************************Values inserted in WorksOn Table************************************")
# Connecting to Mongo db
try:
conn = MongoClient('localhost', 27017)
print("Connected successfully!!!")
except:
print("Could not connect to MongoDB")
# # database
db = conn.company.projects
db.drop()
# Inserting Documents into Projects Collection
print("\nExecuting Query to Find Project Data\n")
DeptProjquery= "Select PName, PNo, DName from company.works_on, company.project, company.department where project.PDeptNo = department.DNum Group By PName"
dbcursor.execute(DeptProjquery)
projresult = dbcursor.fetchall()
prj_file = open("xml_file_projects.xml", 'w')
print("Xml file opened")
cmpny = ET.Element("Company")
prjcts = ET.SubElement(cmpny, "Projects")
for x in projresult:
# print(x)
print("\nExecuting Query to Find Employees for"+str(x[1])+"\n")
EmpWorksquery = "Select ELname, EFname, Hours FROM employee, works_on Where employee.ESSN = works_on.EmpSSN AND works_on.PNum = " + str(x[1])
cur = mydb.cursor()
cur.execute(EmpWorksquery)
empResult = cur.fetchall()
elist=[]
field1 = ET.SubElement(prjcts, "ProjName")
field1.text = x[0]
field2 = ET.SubElement(prjcts, "ProjNum")
field2.text = str(x[1])
field3 = ET.SubElement(prjcts, "DName")
field3.text = x[2]
empls = ET.SubElement(prjcts, "Employees")
for y in empResult:
empList = ["ELname", "EFname", "Hours"]
liststmt = {empList[0]: y[0], empList[1]: y[1],empList[2]:y[2]}
elist.append(liststmt)
field5 = ET.SubElement(empls, "EmpFName")
field5.text = y[0]
field6 = ET.SubElement(empls, "EmpLName")
field6.text = y[1]
field7 = ET.SubElement(empls, "Hours")
field7.text = str(y[2])
prettystr = prettify(cmpny)
print(prettystr)
db.insert_many([{
"PName": x[0],
"PNo": x[1],
"DName": x[2],
"Employees" : elist
}])
prj_file.write(prettystr)
prj_file.close()
print("=============Projects Collection Created==============")
#Inserting Documents into Employee Collection
dbemp = conn.company.employees
dbemp.drop()
print("\nExecuting Query to Find Project Data\n")
empDeptquery= "Select ELname, EFname,DName, ESSN from employee,department Where employee.EDeptNo = department.DNum"
dbcursor.execute(empDeptquery)
deptResult = dbcursor.fetchall()
emp_file = open("xml_file_employees.xml", 'w')
print("Xml file opened")
cmpny = ET.Element("Company")
empls = ET.SubElement(cmpny, "Employees")
for x in deptResult:
# print(x)
empProjectquery ="Select PName, PNo, Hours from employee,project,works_on Where works_on.EmpSSN =" + x[3]+" AND works_on.PNum = project.PNo group by Pname"
cur = mydb.cursor()
cur.execute(empProjectquery)
empProjectResult = cur.fetchall()
projlist = []
field1 = ET.SubElement(empls, "EmpLName")
field1.text = x[0]
field2 = ET.SubElement(empls, "EmpFName")
field2.text = str(x[1])
field3 = ET.SubElement(empls, "DName")
field3.text = x[2]
prjcts = ET.SubElement(empls, "Projects")
for y in empProjectResult:
# print(y)
pList = ["PName", "PNumber", "Hours"]
listitm = {pList[0]: y[0], pList[1]: y[1], pList[2]: y[2]}
projlist.append(listitm)
field5 = ET.SubElement(prjcts, "ProjName")
field5.text = y[0]
field6 = ET.SubElement(prjcts, "ProjNum")
field6.text = str(y[1])
field7 = ET.SubElement(prjcts, "Hours")
field7.text = str(y[2])
prettystr = prettify(cmpny)
print(prettystr)
dbemp.insert_many([{
"ELname": x[0],
"EFname": x[1],
"DName": x[2],
"Projects": projlist
}])
print("=============Employees Collection Created==============")
emp_file.write(prettystr)
emp_file.close()
print("File created")