Postgis 地理列在保存时抛出异常

Question

要事第一：

Ruby: 2.2.3

Rails: 4.2.5

我的数据库中有一个模型（我们称之为目标），它有一个 coordinates 列，它是通过这样的迁移创建的：

add_column :destinations, :coordinates, :st_point, geographic: true

我有一个回调设置来设置传入的 lat 和 lon 字段的坐标：

attr_accessor :lat, :lon

before_validation :set_coordinates

private

def set_coordinates
  if lat.present? && lon.present?
    self.coordinates = "POINT(#{lon} #{lat})"
  end
end

这似乎工作正常。鉴于我已经传入了 lon 和 lat 它 returns coordinates 如下：

coordinates: #<RGeo::Geographic::SphericalPointImpl:0x3ff3b1fa767c "POINT (144.96975 -37.810177)">

然而，当我尝试在模型上调用 save（有或没有 !）时，我遇到了以下错误：

destination.save
fatal: exception reentered
from /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activerecord-4.2.5/lib/active_record/transactions.rb:304:in `rescue in rollback_active_record_state!'

如果我不尝试设置此列，那么模型会正确保存，接下来是快乐的时光。不幸的是，这是模型功能中相当重要的一部分……

到目前为止我已经尝试过的事情：

像这样设置坐标：

self.coordinates = RGeo::Geographic.spherical_factory(:srid => 4326).point(lon,lat)`

设置默认工厂：

RGeo::ActiveRecord::SpatialFactoryStore.instance.tap do |config|
  config.default = RGeo::Geographic.spherical_factory(srid: 4326)
end

我进行了运行所有检查以确保我的数据库中有 Postgis，并且在 gemfile 中安装了最新版本的 activerecord-postgis-adapter。

只是希望其他人可能运行遇到同样的事情并且知道是什么原因造成的。

更新：

再玩了一会儿（删除所有验证并仅在控制台中设置所有内容）后，我设法得到以下错误：

[5] pry(main)> destination.save

NoMethodError:
undefined method `reject!' for nil:NilClass 
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activerecord-4.2.5/lib/active_record/connection_adapters/abstract/transaction.rb:187:in   `rescue in within_new_transaction'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activerecord-4.2.5/lib/active_record/connection_adapters/abstract/transaction.rb:201:in `within_new_transaction'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activerecord-4.2.5/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `transaction'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activerecord-4.2.5/lib/active_record/transactions.rb:220:in `transaction'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activerecord-4.2.5/lib/active_record/transactions.rb:348:in `with_transaction_returning_status'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activerecord-4.2.5/lib/active_record/transactions.rb:291:in `save!'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activesupport-4.2.5/lib/active_support/notifications.rb:166:in `instrument'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activesupport-4.2.5/lib/active_support/notifications.rb:166:in `instrument'
# ./spec/spec_helper.rb:136:in `is_expected_to_have_a_valid_factory'
# ./spec/models/issue_spec.rb:25:in `block (3 levels) in <top (required)>'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `load'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `block in load'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:240:in `load_dependency'
# /Users/myself/.rbenv/versions/2.2.3/gemsets/helpme/gems/activesupport-4.2.5/lib/active_support/dependencies.rb:268:in `load'
# -e:1:in `<main>'
# ------------------
# --- Caused by: ---
# fatal:
#   exception reentered
#

不确定这是否真的有帮助。但我想信息越多越好

更新 2：

日志输出（现在看这里没什么用）：

  SQL (4.7ms)  INSERT INTO "destinations" ("customer_id", "profession_id", "address", "credit_card_id", "coordinates", "created_at", "updated_at") VALUES (, , , , , , ) RETURNING "id"  [["customer_id", "ca5213d1-bdd3-4090-8f5a-11524d9c4dfa"], ["profession_id", "f18d3c54-9315-4415-a832-34299cfa8c5b"], ["address", "45756 Thalia Spurs, O'Connor ACT 6168"], ["credit_card_id", "a6f38078-cce0-4804-8c38-6bca24948c16"], ["coordinates", "0020000001000010e640621f083126e979c042e7b3e1437c57"], ["created_at", "2015-12-17 03:20:51.715434"], ["updated_at", "2015-12-17 03:20:51.715434"]]
  (0.3ms)  ROLLBACK TO SAVEPOINT active_record_2

Answer 1

已解决

经过大量挖掘，在 activerecord-postgis-adapter gem 存储库上发现了 this issue。

似乎安装 meta_request gem 会导致此行为，即使只是在 :development 组中也是如此。

如果其他人遇到这个奇怪而晦涩的问题，我将保留它。

结束这一年的方式……:D

Postgis 地理列在保存时抛出异常

Postgis geography column throwing exception on save

ruby-on-rails

ruby

postgresql

activerecord

postgis