我有一个没有attr_accessible的类，我们称它为MyClass。当我使用
MyClass.find(<id>).update_attributes(
polygon1: MyPolygon1,
polygon2: MyPolygon2
)
数据库中的新值为:
polygon1 = MyPolygon1 (OK)
polygon2 = '' (WRONG)
我们应该考虑MyPolygon1和mypolygon2的值
MyPolygon1 = "POLYGON((-70.43399999999997 -33.480000000000004,-70.44400000000002 -33.485,-70.47199999999998 -33.475,-70.50799999999998 -33.436,-70.53899999999999 -33.429,-70.584 -33.432,-70.608 -33.416000000000004,-70.60500000000002 -33.409,-70.51600000000002 -33.372,-70.47699999999998 -33.364,-70.483 -33.377,-70.47699999999998 -33.393,-70.45400000000001 -33.397,-70.452 -33.417,-70.43399999999997 -33.428,-70.428 -33.458,-70.43399999999997 -33.480000000000004))"
MyPolygon2 = "POLYGON((-70.4337852 -33.48014739999999,-70.4344264 -33.481217,-70.43597139999999 -33.4822192,-70.4372588 -33.4837941,-70.438203 -33.4852258,-70.4388896 -33.4856554,-70.4404346 -33.4856554,-70.4442969 -33.4852258,-70.4472152 -33.484152099999996,-70.449361 -33.4830067,-70.4507342 -33.4825772,-70.45210749999998 -33.4817897,-70.4540816 -33.4805011,-70.4561416 -33.4792841,-70.4582873 -33.4778523,-70.460004 -33.476420399999995,-70.4615489 -33.4756329,-70.4646388 -33.4754181,-70.4672996 -33.4752033,-70.4694453 -33.4752749,-70.4710761 -33.4752033,-70.47244939999999 -33.4747022,-70.4742519 -33.4731987,-70.4764835 -33.4707644,-70.4779426 -33.4687597,-70.4800025 -33.46704129999999,-70.4822341 -33.4653229,-70.4841224 -33.463676,-70.4859715 -33.4628224,-70.4870873 -33.45945689999999,-70.48871809999999 -33.456521,-70.4906246 -33.4546496,-70.4916363 -33.4536566,-70.4939537 -33.4516515,-70.4955845 -33.450792099999994,-70.4949837 -33.4485004,-70.4949837 -33.4478201,-70.4952412 -33.4468891,-70.4961853 -33.445779,-70.4981165 -33.44427499999999,-70.4995327 -33.4429859,-70.5005627 -33.4416036,-70.5015068 -33.4405651,-70.5037814 -33.438573899999994,-70.5061417 -33.4368979,-70.5083304 -33.4358952,-70.5095063 -33.43569459999999,-70.51133449999999 -33.4354439,-70.5131798 -33.4353365,-70.5148964 -33.435085799999996,-70.5160981 -33.43467749999999,-70.5173855 -33.4341188,-70.519351 -33.4331017,-70.5199347 -33.4328439,-70.5205698 -33.4326505,-70.5215912 -33.4322708,-70.5222865 -33.4319342,-70.5229302 -33.431532999999995,-70.5236683 -33.4316118,-70.5284062 -33.4322064,-70.5324145 -33.4326863,-70.5378476 -33.4333739,-70.5379935 -33.4333453,-70.5381737 -33.433030099999996,-70.5385428 -33.432249299999995,-70.5388003 -33.4316333,-70.53898049999998 -33.4310388,-70.5390835 -33.4304729,-70.5391522 -33.4299214,-70.5391522 -33.4295202,-70.539135 -33.4291406,-70.5390749 -33.4288397,-70.5428772 -33.4292409,-70.54369229999999 -33.4293347,-70.5477953 -33.4298068,-70.5524731 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最后我可以添加我的数据库的一些相关信息。我使用postgres适配器，列的类型是几何(Polygon,4326)。
我错过了什么?._ .
poligon2列的类型是什么?也许您尝试保存的数据对于您的列类型来说太长(9k字符)。
终于找到了错误…
-70.4337852 -33.48014739999999,
-70.4337852 -33.48014739999999
多边形的最后两点是相同的。Postgis将该多边形保存为空白寄存器。_.
非常感谢大家!:)