uuid

I am looking to convert a boost::uuid to a const char*. What is the correct syntax for the conversion? user192610 You can do this a bit easier using boost::lexical_cast that uses a std::stringstream under the hood. #include <boost/lexical_cast.hpp> #include <boost/uuid/uuid_io.hpp> const std::string tmp = boost::lexical_cast<std::string>(theUuid); const char * value = tmp.c_str(); Just in case, there is also boost::uuids::to_string , that works as follows: #include <boost/uuid/uuid.hpp> #include <boost/uuid/uuid_io.hpp> boost::uuids::uuid a = ...; const std::string tmp = boost::uuids::to

I get this error when i try to pass the UUID attribute to url parameter. urlpatterns = [ url(r'^historia-clinica/(?P<uuid>[W\d\-]+)/$', ClinicHistoryDetail.as_view(), name='...'), ] views.py class ClinicHistoryDetail(...): ... my_object = MyModel.objects.create(...) ... return redirect(reverse('namespace:name', kwargs={'uuid' : my_object.id})) model.py class MyModel(models.Model): id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False) ... Any suggestions? There is a bug ticket on Django regarding this issue however a custom so called 'complex encoder' by python docs can

I receive the data as { "name": "Unknown", "parent": "Uncategorized", "uuid": "06335e84-2872-4914-8c5d-3ed07d2a2f16" }, and I need to convert the uuid from String to uuid I did not find a way on the python docs , or am I missing something basic here? Just pass it to uuid.UUID : import uuid o = { "name": "Unknown", "parent": "Uncategorized", "uuid": "06335e84-2872-4914-8c5d-3ed07d2a2f16" } print uuid.UUID(o['uuid']).hex If the above answer didn't work for you for converting a valid UUID in string format back to an actual UUID object... using uuid.UUID(your_uuid_string) worked for me. In [6]:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm using pylons and sqlalchemy and I was wondering how I could have some randoms ids as primary_key. 回答1: the best way is to use randomly generated UUIDs: import uuid id = uuid.uuid4() uuid datatypes are available natively in some databases such as Postgresql (SQLAlchemy has a native PG uuid datatype for this purpose - in 0.5 its called sqlalchemy.databases.postgres.PGUuid ). You should also be able to store a uuid in any 16 byte CHAR field (though I haven't tried this specifically on MySQL or others). 回答2: i use this pattern and it works

What I am trying to achieve is generate a UUID which is automatically assigned during a DB Insert. Similar to the primary key column named "id" generating an id value. The model values looks something like this: @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(nullable = false) private Long id; @GeneratedValue(generator = "uuid2") @GenericGenerator(name = "uuid2", strategy = "uuid2") @Column(name = "uuid", columnDefinition = "BINARY(16)") private UUID uuid; But when the DB insert is done. the "uuid" is empty. Help is greatly appreciated. And if I am asking an obvious stupid question

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to use a UUID for the id for my domain objects. The idea is that the uuid could be provided by a client and if not a UUID will be generated. I have the definition as like so : : class Person { static mapping = { id generator:'assigned' } String id def getUUID ={ return java.util.UUID.randomUUID().toString(); } transient beforeInsert = { if ( id == null || id.equals("")) id = getUUID(); } } Now assuming I strip the dashes out that are included in the java UUID or client provided UUID I'd like this to be stored in a binary field in my

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I would like to use a GIN index on uuid[] (to have efficient membership tests for arrays of uuids). However when I try it PostgreSQL gives me an error: mydb=> CREATE TABLE foo (val uuid[]); CREATE TABLE mydb=> CREATE INDEX foo_idx ON foo USING GIN(val); ERROR: data type uuid[] has no default operator class for access method "gin" HINT: You must specify an operator class for the index or define a default operator class for the data type. How can I add the necessary operator class so that it works? Note that this is a similar question for the