2016-05-23 33 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)) 

我們試圖使用Python將MultiLineString插入到PostgreSQL數據庫中。我們正在使用ppygis將我們的座標轉換爲實際的幾何圖形。看臺是要插入的座標。該列表的格式如下:psycopg2.InternalError:解析錯誤 - 無效幾何

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

當插入到數據庫中,我們得到這個錯誤:如果我們改變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 

的錯誤是:

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

的ppygis python模塊也嚴重缺乏文檔,我們不知道哪個是錯誤。

任何幫助?謝謝。

回答

2

請勿使用St_PointFromText(),因爲您的幾何圖形已經以WKB格式(ST_PointFromText需要格式爲WKT的幾何圖形)。

簡單地改變你的語句,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))