def save_data(key):
jsoned = trans(request.get_data())
value = jsoned["payload"]
res = blockchain.save_data(key, value)
if res["success"] == True:
# save to data_on_chain
an_item = Data_on_chain()
an_item.key = key
an_item.value = value
an_item.tx_id = res['payload']['txId']
an_item.last_update_time = datetime.datetime.now()
db.session.add(an_item)
db.session.commit()
# save to transactions
a_tx = Transactions()
a_tx.key = key
a_tx.value = value
a_tx.tx_id = res['payload']['txId']
a_tx.operation = "create"
a_tx.timestamp = datetime.datetime.now()
db.session.add(a_tx)
db.session.commit()
db.session.refresh(a_tx)
return json.dumps(a_tx.to_dict())
else:
return "error"
def update_data(key):
jsoned = trans(request.get_data())
value = jsoned["payload"]
res = blockchain.update_data(key, value)
if res["success"] == True:
# update data
an_item = Data_on_chain.query.filter_by(key=key).first()
# get last one:
# obj = session.query(ObjectRes).order_by(ObjectRes.id.desc()).first()
an_item.value = value
an_item.tx_id = res['payload']['txId']
an_item.last_update_time = datetime.datetime.now()
db.session.add(an_item)
db.session.commit()
# save to transactions
a_tx = Transactions()
a_tx.key = key
a_tx.value = value
a_tx.tx_id = res['payload']['txId']
a_tx.operation = "update"
a_tx.timestamp = datetime.datetime.now()
db.session.add(a_tx)
db.session.commit()
db.session.refresh(a_tx)
return json.dumps(a_tx.to_dict())
else:
return "error"
def delete_data(key):
res = blockchain.delete_data(key)
if res["success"] == True:
# delete item in data_on_chain
item = Data_on_chain.query.filter_by(key=key).first()
db.session.delete(item)
db.session.commit()
# save to transactions
a_tx = Transactions()
a_tx.key = key
a_tx.tx_id = res['payload']['txId']
a_tx.operation = "delete"
a_tx.timestamp = datetime.datetime.now()
db.session.add(a_tx)
db.session.commit()
db.session.refresh(a_tx)
return json.dumps(a_tx.to_dict())
else:
return "error"