2016-05-23 193 views
1
 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)) 

我们试图使用Python将MultiLineString插入到PostgreSQL数据库中。我们正在使用ppygis将我们的坐标转换为实际的几何图形。看台是要插入的坐标。该列表的格式如下:psycopg2.InternalError:解析错误 - 无效几何

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

当插入到数据库中,我们得到这个错误:如果我们改变ST_PointFromText到ST_GeomFromText

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

的错误是:

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

的ppygis python模块也严重缺乏文档,我们不知道哪个是错误。

任何帮助?谢谢。

回答

2

请勿使用St_PointFromText(),因为您的几何图形已经以WKB格式(ST_PointFromText需要格式为WKT的几何图形)。

简单地改变你的语句,以便:

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))