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#!/usr/bin/python
import sys
import json
import sqlite3
class DbContext:
def __init__(self, filename):
self.dbconn = sqlite3.connect(filename)
def __enter__(self):
return self
def __exit__(self, type, value, traceback):
if type:
print("Error occured while handling data, Rolling back any changes to the database:\n '{0}':'{1}'\n{2}".format(type, value, traceback))
self.dbconn.rollback()
else:
self.dbconn.commit()
self.dbconn.close()
return True
def addBatch(self, jsondict, table):
for row in jsondict.get(table, []):
self.addIng(row, table)
def addIng(self, x, tableName):
cursor = self.dbconn.cursor()
setClause = ''
for c, v in x.items():
setClause = setClause + '{0} = "{1}", '.format(c,v)
setClause = setClause[:-2]
cursor.execute('INSERT INTO {0} DEFAULT VALUES'.format(tableName))
newId = cursor.lastrowid
cursor.execute('UPDATE {0} SET {1} WHERE id = {2}'.format(tableName, setClause, newId))
cursor.execute('INSERT INTO bt_{0} DEFAULT VALUES'.format(tableName))
newBtId = cursor.lastrowid
cursor.execute(
'UPDATE bt_{0} '.format(tableName) +
'SET {0}_id = '.format(tableName) + str(newId) + ' ' +
'WHERE id = ' + str(newBtId)
)
if __name__ == "__main__" :
jsonFilename = sys.argv[1]
databaseFilename = '../data/default_db.sqlite'
with open(jsonFilename) as jsonFile, DbContext(databaseFilename) as c:
bigDict = json.load(jsonFile)
c.addBatch(bigDict, 'fermentable')
c.addBatch(bigDict, 'hop')
c.addBatch(bigDict, 'misc')
c.addBatch(bigDict, 'yeast')
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