uuid

Django的Form主要具有一下几大功能： 生成HTML标签 验证用户数据（显示错误信息） HTML Form提交保留上次提交数据 初始化页面显示内容 小试牛刀 1、创建Form类 from django.forms import Form from django.forms import widgets from django.forms import fields class MyForm(Form): user = fields.CharField( widget=widgets.TextInput(attrs={'id': 'i1', 'class': 'c1'}) ) gender = fields.ChoiceField( choices=((1, '男'), (2, '女'),), initial=2, widget=widgets.RadioSelect ) city = fields.CharField( initial=2, widget=widgets.Select(choices=((1,'上海'),(2,'北京'),)) ) pwd = fields.CharField( widget=widgets.PasswordInput(attrs={'class': 'c1'}, render_value=True) ) 2、View函数处理 from

I can't use directly uuid with gist index CREATE INDEX idx_leaderboads_values_gist ON leaderboard_entry USING gist (id_leaderboard , value); And I got this error: ERROR: data type uuid has no default operator class for access method "gist" HINT: You must specify an operator class for the index or define a default operator class for the data type. Postgres 10 or newer btree_gist now also covers the data type uuid , like Paul commented . (And some other data types, remarkably all enum types.) Now all you need to do: install the extension once per database: CREATE EXTENSION btree_gist; Then your

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I'm trying to extract the timestamp from a V1 uuid, naively wished this worked: select '3efe0a20-f1b3-11e3-bb44-14109fec739e'::uuid::timestamp; Here is a quick example showing how to extract the time in go, but I'm hoping postgresql has something built-in rather than creating a one-off pl/pgSql function. http://play.golang.org/p/XRCooLgfaG I've tested this with uuid's from my database and it seems to work very well, even without the unsigned bigints CREATE FUNCTION uuid_timestamp(id uuid) RETURNS timestamptz AS $$ select TIMESTAMP WITH TIME ZONE 'epoch' + (((('x' || lpad(split_part(id::text, '

One of my Rails migrations uses a uuid as the primary key. The Postgres extension gen_random_uuid() should solve this issue, but I continue to get the error after installing the relevant extension ( uuid-ossp ). The issue was that the uuid-ossp extension was being blown away with the database each time I dropped the db as part of a reset and migration (e.g. rake db:drop db:create db:migrate ). The fix is to create a migration that's run before all other migrations which enables the relevant extension(s). Like so ( db/migrate/0_enable_extensions.rb ): class EnableExtensions < ActiveRecord:

I have a mysql table in which I'm using a UUID as the primary key. Here's the creation migration: Schema::create('people', function (Blueprint $table) { $table->uuid('id'); $table->primary('id'); ... $table->timestamps(); } Which generates the following MySQL schema: CREATE TABLE `people` ( `id` char(36) COLLATE utf8_unicode_ci NOT NULL, ... `created_at` timestamp NULL DEFAULT NULL, `updated_at` timestamp NULL DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci; In my Eloquent model I have a method for creating an instance which calls a method for