Thanks kyle!
Unfortunately, when I try to create the property `@class` like this :
`data = {"@class":"MyV","ovgid":"test1", "element_type":"MyV"}`,
I get the following error:
`
SystemError: ({'status': '500', 'transfer-encoding': 'chunked', 'server':
'grizzly/2.2.16', 'connection': 'close', 'date': 'Wed, 22 Apr 2015 07:09:12
GMT', 'access-control-allow-origin': '*', 'content-type':
'application/json'}, '{"message":"","error":"javax.script.ScriptException:
com.orientechnologies.orient.core.exception.OSchemaException: Cannot change
the schema while a transaction is active. Schema changes are not
transactional","api":{"description":"evaluate an ad-hoc Gremlin script for
a graph.","parameters":{"returnTotal":"when set to true, the full result
set will be iterated and the results returned (default is
false)","rexster.returnKeys":"an array of element property keys to return
(default is to return all element
properties)","rexster.showTypes":"displays the properties of the elements
with their native data type (default is false)","load":"a list of \'stored
procedures\' to execute prior to the \'script\' (if \'script\' is not
specified then the last script in this argument will return the
values","rexster.offset.end":"end index for a paged set of data to be
returned","rexster.offset.start":"start index for a paged set of data to be
returned","params":"a map of parameters to bind to the script
engine","language":"the gremlin language flavor to use (default is
groovy)","script":"the Gremlin script to be evaluated"}},"success":false}')
`
But, if I change `@class` to something else, it works. Any solution?
And also what is that `ovgid` property?
On Tue, Apr 21, 2015 at 11:35 PM, Kyle <[email protected]> wrote:
> You are right,
>
> select from MyV set element_name = "myv"
>
>
> should be
>
> update MyV set element_name = "myv"
>
>
> sorry.
>
> From within bulbs you can create a vertex of type "MyV" by doing
>
>
> In [9]: data = {"@class":"MyV","ovgid":"test1", "element_type":"MyV"}
>> In [10]: v=g.vertices.create(data)
>
>
>
> On Tuesday, April 21, 2015 at 10:37:52 AM UTC-7, Kevin I wrote:
>>
>> @kyle,
>>
>> Sorry to get back so late. I can't quite wrap my head around this. From
>> what you've said and I understand from the docs and from fiddling with the
>> console, this is what I've understood:
>>
>> 1. In orientdb, all classes are identified with the `@CLASS` property
>> just like the classes in Bulbs are identified with `element_type` property.
>> 2. A Class cannot be changed in orientdb, once it is created.
>>
>> I have the following classes in Bulbs for example :
>> Student, Staff, Subject, Branch
>>
>> Now, I need to create lucene indexes for which I cannot use Bulbs. So, I
>> get into the Orientdb console. As you said, I tried creating the class
>> `Student` in orientdb too, like this:
>>
>> `create class Student extends V`
>>
>> But, still all the above 4 bulbs class type objects are shown as `V`
>> objects in orientdb. ie. the number of `Student` records in orientDB is 0.
>>
>> So, in short, what I want to do is to convert the `V` type records to the
>> `Student`, `Staff`, `Subject` and `Branch` type records in OrientDB, so
>> that I can create indices in Lucene for my search module.
>>
>> Also, I tried your command :
>> `select from MyV set element_name = "myv"`
>> but it throwed a syntax error.
>>
>> Thank you for your help so far. Looking ahead for your reply!
>>
>> On Wed, Apr 15, 2015 at 11:58 PM, <[email protected]> wrote:
>>
>>> <class-name> refers to classes defined in Orientdb.
>>>
>>> http://orientdb.com/docs/last/orientdb.wiki/Tutorial-Classes.html
>>>
>>> Useful default classes are "V" for vertices, and "E" for edges.
>>>
>>> You can define a new classes like:
>>>
>>> create class MyV extends V
>>> create class MyE extends E
>>>
>>> you can do
>>>
>>> create property V.element_name STRING
>>> select from MyV set element_name = "myv"
>>>
>>> (all above are osql console commands)
>>> to create an element name property, and populate all records of that
>>> class with a string representing that property (this relates to what I
>>> mentioned before about not seeing any way to access the "@class" field in
>>> bulbs).
>>>
>>> You can now create bulbs model classes that correspond to the classes in
>>> Orientdb itself. "element_name" is the default field name to associate
>>> graphdb records with bulbs python model classes, it can be changed if
>>> something else works better for you.
>>>
>>>
>>> On Tuesday, April 14, 2015 at 9:05:33 PM UTC-7, Kevin I wrote:
>>>>
>>>> Thank you very much ky...! I've installed pyorient.
>>>>
>>>> But now, what is this class name here :
>>>>
>>>> CREATE INDEX <name> ON <class-name> (prop-names) FULLTEXT ENGINE LUCENE
>>>>
>>>>
>>>> as found in this wiki here
>>>> <https://github.com/orientechnologies/orientdb-lucene/wiki/Full-Text-Index>?
>>>> I tried using the Bulbs model class name and obviously it didn't work. Do I
>>>> have to define separate classes for this? If so, can you please show how to
>>>> do it?
>>>>
>>>> Thanks!
>>>>
>>>>
>>>> On Wednesday, April 15, 2015 at 12:13:11 AM UTC+5:30,
>>>> [email protected] wrote:
>>>>>
>>>>> I'm pretty certain you can't create these fancy orientdb indices via
>>>>> bulbs.
>>>>>
>>>>> ----
>>>>> This open issue is about adding support to directly talk to orientdb
>>>>> via the REST api.
>>>>> https://github.com/espeed/bulbs/issues/128
>>>>> I'd very much like this feature!
>>>>>
>>>>> ----
>>>>> you can use pyorient to talk to orientdb in python:
>>>>> https://github.com/mogui/pyorient
>>>>>
>>>>> ----
>>>>>
>>>>> Additionally, there are serialization issues with custom orientdb
>>>>> stuff.
>>>>>
>>>>> e.g, a list of
>>>>> EMBEDDED SETS/LISTS get serialized as:
>>>>> u'kind': u'[tv_tv_program, film_film]'
>>>>>
>>>>> I've noticed DATE fields getting serialized as:
>>>>> u'modified': u'Wed Apr 01 15:58:46 PDT 2015',
>>>>> which can cause problems (e.g, schema violation when not turned back
>>>>> into date) when trying to save via bulbs
>>>>>
>>>>> LINKLIST/SET properties are serialized as
>>>>> u'cast':
>>>>> u'com.tinkerpop.blueprints.impls.orient.OrientElementIterable@3949de91
>>>>> ',
>>>>> which is completely unworkable. The only workaround I know is
>>>>> judicious use of server side gremlin scripts.
>>>>>
>>>>> Bulbs doesn't seem to have access to the "@class" property so you
>>>>> can't know the class of a record without adding another field to record
>>>>> that, I think this is a problem at the rexster level though I am unsure.
>>>>>
>>>>> The date and embedded set/list problems can easily be fixed by
>>>>> subclassing the Property class in
>>>>> https://github.com/espeed/bulbs/blob/master/bulbs/property.py
>>>>> and creating custom conversion to/from python/orientdb.
>>>>>
>>>>>
>>>>> On Tuesday, April 14, 2015 at 8:33:15 AM UTC-7, Kevin I wrote:
>>>>>>
>>>>>> I just realized that I'm trying to interpret the SQL query with the
>>>>>> Gremlin interpreter.
>>>>>>
>>>>>> Still I don't know how to execute it.
>>>>>>
>>>>>> On Tuesday, April 14, 2015 at 9:01:17 PM UTC+5:30, Kevin I wrote:
>>>>>>>
>>>>>>> I have the Lucene index plugin installed and active. I just can't
>>>>>>> figure out how to create indices. I tried this:
>>>>>>>
>>>>>>> g.gremlin.execute('create index Student.name on Student (name)
>>>>>>> fulltext engine lucene')
>>>>>>>
>>>>>>> but it doesn't work. Returns the following error:
>>>>>>>
>>>>>>> SystemError: ({'status': '500', 'transfer-encoding': 'chunked',
>>>>>>> 'server': 'grizzly/2.2.16', 'connection': 'close', 'date': 'Tue, 14
>>>>>>> Apr 2015 20:54:50 GMT', 'access-control-allow-origin': '*',
>>>>>>> 'content-type': 'application/json'},
>>>>>>> '{"message":"","error":"javax.script.ScriptException:
>>>>>>> groovy.lang.MissingPropertyException: No such property: index for class:
>>>>>>> Script5","api":{"description":"evaluate an ad-hoc Gremlin script for a
>>>>>>> graph.","parameters":{"returnTotal":"when set to true, the full result
>>>>>>> set
>>>>>>> will be iterated and the results returned (default is
>>>>>>> false)","rexster.returnKeys":"an array of element property keys to
>>>>>>> return
>>>>>>> (default is to return all element
>>>>>>> properties)","rexster.showTypes":"displays the properties of the
>>>>>>> elements
>>>>>>> with their native data type (default is false)","load":"a list of
>>>>>>> \'stored
>>>>>>> procedures\' to execute prior to the \'script\' (if \'script\' is not
>>>>>>> specified then the last script in this argument will return the
>>>>>>> values","rexster.offset.end":"end index for a paged set of data to be
>>>>>>> returned","rexster.offset.start":"start index for a paged set of data
>>>>>>> to be
>>>>>>> returned","params":"a map of parameters to bind to the script
>>>>>>> engine","language":"the gremlin language flavor to use (default is
>>>>>>> groovy)","script":"the Gremlin script to be
>>>>>>> evaluated"}},"success":false}'
>>>>>>> )
>>>>>>>
>>>>>>> What am I missing here?
>>>>>>>
>>>>>> --
>>>
>>> ---
>>> You received this message because you are subscribed to a topic in the
>>> Google Groups "OrientDB" group.
>>> To unsubscribe from this topic, visit
>>> https://groups.google.com/d/topic/orient-database/Oi34bWhARAU/unsubscribe
>>> .
>>> To unsubscribe from this group and all its topics, send an email to
>>> [email protected].
>>> For more options, visit https://groups.google.com/d/optout.
>>>
>>
>>
>>
>> --
>> Always remember that the world around you is made by people that are no
>> smarter than you and me.
>>
> --
>
> ---
> You received this message because you are subscribed to a topic in the
> Google Groups "OrientDB" group.
> To unsubscribe from this topic, visit
> https://groups.google.com/d/topic/orient-database/Oi34bWhARAU/unsubscribe.
> To unsubscribe from this group and all its topics, send an email to
> [email protected].
> For more options, visit https://groups.google.com/d/optout.
>
--
Always remember that the world around you is made by people that are no
smarter than you and me.
--
---
You received this message because you are subscribed to the Google Groups
"OrientDB" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
