chaz1942 (常超)

alidayu-chaz1942 0.1.1.0 发布

chaz1942 — Sun, 03 Sep 2017 19:20:13 +0800

阿里大于最近更改了接口，对于最新的接口没有 gem，顺手写了一个。 gem 中除了封装发送短信接口外，还提供了用于签名的 POP 协议的签名方法。发送短信方法：步骤 1 设置 access_key_id 和 access_key_secret

Alidayu.access_key_id = 'YOUR ACCESS KEY ID'
Alidayu.access_key_secrete = 'YOUR ACCESS KEY SECRET'

步骤 2 发送短信

Alidayu.send_text_message({
  PhoneNumbers: '手机号码',
  TemplateParam: {code: '1234'}, //模版参数和模版设置相关，我的模版content为'您的验证码${code}'
  SignName: '短信签名',
  TemplateCode: 'template code'})

除此之外可以用与对参数进行 POP 签名，根据官方文档的签名例子，最终签名为zJDF+Lrzhj/ThnlvIToysFRq6t4=

Alidayu.access_key_id = 'testId'
Alidayu.access_key_secrete = 'testSecret'
signature_params = {
  Timestamp: '2017-07-12T02:42:19Z',
  SignatureMethod: 'HMAC-SHA1',
  SignatureVersion: '1.0',
  SignatureNonce: '45e25e9b-0a6f-4070-8c85-2956eda1b466',
  Action: 'SendSms',
  Version: '2017-05-25',
  RegionId: 'cn-hangzhou',
  PhoneNumbers: '15300000001',
  SignName: '阿里云短信测试专用',
  TemplateCode: 'SMS_71390007',
  TemplateParam:  "{\"customer\":\"test\"}",
  Format: 'XML',
  OutId: '123'}
 signature = Alidayu.get_signature signature_params

get_signature 的返回值经过一次 Base64 得到zJDF%2BLrzhj%2FThnlvIToysFRq6t4%3D

PostgreSQL 更改数据库字段类型报错 ‘PG::DatatypeMismatch: ERROR: column xxx cannot be cast automatically to type integer’

chaz1942 — Mon, 18 Jul 2016 12:13:38 +0800

刚才想更改数据库的字段类型由 string 改为 integer，刚开始这么写的

change_column :table_name, :column_name, :integer

报错

== 20160718031624 xxxxx: migrating ======================
-- change_column(:table_name, :column_name, :integer)
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

PG::DatatypeMismatch: ERROR:  column "column_name" cannot be cast automatically to type integer
HINT:  You might need to specify "USING freight_calculation_rule_id::integer".

上面说需要配置"USING freight_calculation_rule_id::integer"

看了下源码

def change_column(table_name, column_name, type, options = {})
  clear_cache!
  quoted_table_name = quote_table_name(table_name)
  sql_type = type_to_sql(type, options[:limit], options[:precision], options[:scale])
  sql_type << "[]" if options[:array]
  sql = "ALTER TABLE #{quoted_table_name} ALTER COLUMN #{quote_column_name(column_name)} TYPE #{sql_type}"
  sql << " USING #{options[:using]}" if options[:using]
  if options[:cast_as]
    sql << " USING CAST(#{quote_column_name(column_name)} AS #{type_to_sql(options[:cast_as], options[:limit], options[:precision], options[:scale])})"
  end
  execute sql

  change_column_default(table_name, column_name, options[:default]) if options_include_default?(options)
  change_column_null(table_name, column_name, options[:null], options[:default]) if options.key?(:null)
end

将需要配置的 USING 放到 option[:using] 写成如下格式

change_column :shipping_area_freight_calculation_rules, :freight_calculation_rule_id, :integer, using: 'freight_calculation_rule_id::integer'

执行成功，一点小小的心得，希望能帮助到别人。学习 rails 就像打怪升级，一不小心就解锁了隐藏技能

ransack 搜索条件

chaz1942 — Wed, 06 Apr 2016 10:08:49 +0800

前几天做 ransack 模糊搜索时，关于查询条件发现网上没有太多的解释，于是下载源码搜索了一下，找到了所有的搜索条件，现在发出啦与大家分享一下，希望对大家有帮助。关于 ransack 的介绍 github 上有就不赘述了https://github.com/activerecord-hackery/ransack

eq: "等于"
eq_any: "等于任意值"
eq_all: "等于所有值"
not_eq: "不等于"
not_eq_any: "不等于任意值"
not_eq_all: "不等于所有值"
matches: "符合"
matches_any: "符合任意条件"
matches_all: "符合所有条件"
does_not_match: "不符合"
does_not_match_any: "符合任意条件"
does_not_match_all: "不符合所有条件"
lt: "小于"
lt_any: "小于任意一个值"
lt_all: "小于所有值"
lteq: "小于等于"
lteq_any: "小于等于任意一个值"
lteq_all: "小于等于所有值"
gt: "大于"
gt_any: "大于任意一个值"
gt_all: "大于所有值"
gteq: "大于等于"
gteq_any: "大于等于任意一个值"
gteq_all: "大于等于所有值"
in: "被包含"
in_any: "被任意值包含"
in_all: "被所有值包含"
not_in: "不被包含"
not_in_any: "不被任意值包含"
not_in_all: "不被所有值包含"
cont: "包含"
cont_any: "包含任意一个值"
cont_all: "包含所有值"
not_cont: "不包含"
not_cont_any: "不包含任意一个值"
not_cont_all: "不包含所有值"
start: "以改值开始"
start_any: "以任意一个值开始"
start_all: "以所有值开始"
not_start: "不以改值开始"
not_start_any: "不以任意一个值开始"
not_start_all: "不以所有值开始"
end: "以改值结尾"
end_any: "以任意一个值结尾"
end_all: "以所有值结尾"
not_end: "不以改值结尾"
not_end_any: "不以任意一个值结尾"
not_end_all: "不以所有值结尾"
'true': "等于true"
'false': "等于false"
present: "有值"
blank: "为空"
'null': "是null"
not_null: "不是null"