CODEWITHSUNDEEP
pythonpostgresqlgispostgispsycopg2
PRVS
PRVS

Reputation: 1690

psycopg2.InternalError: parse error - invalid geometry

        x = float(stand[1].split(' ')[0])
        y = float(stand[1].split(' ')[1])
        coordinate = ppygis.Point(x, y)
        coordinate.srid = SRID_WGS84
        # Stand delimiters
        delimiter = []
        line = []

        for i in range(2, len(stand)):
            # The cycle will run through everythin in the stand list
            # But it will only actually do something when it finds a coordinate
            # counter
            if (len(stand[i].split(' ')) == 1):
                # Number of coordinates to process. Adjusted for indexation
                ncoords = int(stand[i]) + 1

                for c in range(i + 1, i + ncoords, 1):
                    x = float(stand[c].split(' ')[0])
                    y = float(stand[c].split(' ')[1])

                    point = ppygis.Point(x, y)
                    point.srid = SRID_WGS84
                    line.append(point)
                line = ppygis.LineString((line))
                delimiter.append(line)
                line = []
        delimiter = ppygis.MultiLineString((delimiter))
        cur.execute("""
                INSERT INTO taxi_stands(id, name, coordinates, delimiter_geom)
                VALUES(%s, %s, ST_PointFromText(%s), %s);
                """, (taxi_stands_list.index(stand), stand_name, coordinate,
                    delimiter))

We are trying to insert a MultiLineString into a PostgreSQL database using Python. We are using ppygis to convert our coordinates to actual geometries. The stands are coordinates to be inserted. The list's format is as follows:

[nº of points in line, x1line1, y1line1, ..., nº of points in line, ...]

When inserting into the database we get this error:

psycopg2.InternalError: parse error - invalid geometry
HINT:  "0101000020e6100000645d" <-- parse error at position 22 within geometry
CONTEXT:  SQL function "st_pointfromtext" statement 1

if we change ST_PointFromText to ST_GeomFromText the error is:

psycopg2.InternalError: parse error - invalid geometry
HINT:  "0101000020e6100000645d" <-- parse error at position 22 within geometry

The ppygis python module is also severely lacking in documentation and we don't know which is the error.

Any help? Thanks.

Upvotes: 3

Views: 3111

Answers (1)

Tom-db
Tom-db

Reputation: 6868

Don't use St_PointFromText() because your geometries are already in WKB format (ST_PointFromText requires geometries in WKT format).

Simply Change your statement so:

cur.execute("""
                INSERT INTO taxi_stands(id, name, coordinates, delimiter_geom)
                VALUES(%s, %s, %s, %s);
                """, (taxi_stands_list.index(stand), stand_name, coordinate,
                    delimiter))

Upvotes: 3

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