parameterize queries in OrientDB using placeholders - orientdb

Question

I am using pyorient and and want to parameterize queries -- I am assuming that command() allows placeholders, but am not able to find any documentation. IN particular I'd like to use dict() args as per postgres' %(name)s construct, but could make tuples/lists work as well.

Answer 1

I tried your case with my python_test database:
Dataset:
I used two parameters:
name ---> string;
surname ---> string;
and I passed them into the command() function.
PyOrient Code:
import pyorient
db_name = 'python_test'
user = 'root'
pwd = 'root'
print("Connecting...")
client = pyorient.OrientDB("localhost",2424)
session_id = client.connect(user, pwd)
print("OK - sessionID: ",session_id,"\n")
if client.db_exists( db_name, pyorient.STORAGE_TYPE_PLOCAL ):
print("DB "+db_name+" already exists\n")
client.db_open(db_name, user, pwd, pyorient.DB_TYPE_GRAPH, pyorient.STORAGE_TYPE_PLOCAL)
name = 'test name'
surname = 'test surname'
vertexes = client.command("SELECT FROM TestClass WHERE name = '" + name + "' AND surname = '" + surname + "'")
for vertex in vertexes:
print(vertex)
else:
print("Creating DB "+ db_name + "...")
client.db_create( db_name, pyorient.DB_TYPE_GRAPH, pyorient.STORAGE_TYPE_PLOCAL )
print("DB " + db_name + " created\n")
client.db_close()
Output:
Connecting...
OK - sessionID: 40
DB python_test already exists
{'#TestClass':{'surname': 'test surname', 'name': 'test name'},'version':1,'rid':'#12:0'}
Hope it helps