Question

我的orace数据库中有一个列，类型为varchar2（256Byte）。现在我用web.py和cx_Oracle编写了一个webserver来进行查询并获取结果。问题是我没有为此列获取任何值。但奇怪的是，它适用于另一个具有相同类型的列。

代码：

import cx_Oracle
import json
import web

urls = (
    "/", "index",
    "/grid", "grid",
)
app = web.application(urls, globals())
web.config.debug = True

connection = cx_Oracle.Connection("TEST_3D/limo1013@10.40.33.160:1521/sdetest")
typeObj = connection.gettype("MDSYS.SDO_GEOMETRY")

class index:
    def GET(self):
        return "hallo moritz "


class grid:
    def GET(self):
        web.header('Access-Control-Allow-Origin', '*')
        web.header('Access-Control-Allow-Credentials', 'true')
        web.header('Content-Type', 'application/json')


        cursor = connection.cursor()
        cursor.arraysize = 100000  # default = 50
        cursor.execute(
            """SELECT a.id , a.json2, d.Classname FROM   building a, THEMATIC_SURFACE b, SURFACE_GEOMETRY c, OBJECTCLASS d  WHERE  a.grid_id_500 = 2728 AND a.id = b.BUILDING_ID AND b.LOD2_MULTI_SURFACE_ID = c.ROOT_ID AND c.GEOMETRY IS NOT NULL           AND b.OBJECTCLASS_ID = d.ID""")

       obj = cursor.fetchone()
       print obj
        result = []
        for id, json2, classname in cursor:
            result.append({
                "building_nr":id,"geometry": {
                  "type":"polygon","coordinates":json2,}, "polygon_typ":classname,})
  return result

if __name__ == "__main__":
    app.run(web.profiler)

对于json2，我没有得到任何值： [{＆＃39; building_nr＆＃39;：1314867，＆＃39;几何＆＃39;：{＆＃39;类型＆＃39;：＆＃39;多边形＆＃39;，＆＃39;坐标＆＃39;：无}，＆＃39; polygon_typ＆＃39;：＆＃39; BuildingWallSurface＆＃39;}，....

有什么问题？

Answer 1

您是否正在使用具有Oracle对象支持的迄今未发布的cx_Oracle版本？见How to convert SDO_GEOMTRY in GeoJSON

cx_Oracle中没有varchar的值

1 个答案: