缺少Alfresco文档派生内容<；内容>；

我已经创建了一个从文档派生的自定义内容类型。我正在尝试使用CMIS以编程方式查询Alfresco服务器（尝试使用4.2.b和4.2.c）中使用python的文档。我有一个金字塔服务器，它接受REST调用并使用CMIS将它们发送到我的Alfresco服务器

我得到这个错误：

2013-04-11 11:19:25,526 | ERROR | Exception when serving /access_manager/search_noauth
Traceback (most recent call last):
  File "/home/hbrown/.virtualenvs/access_manager_master/local/lib/python2.7/site-packages/waitress-0.8.1-py2.7.egg/waitress/channel.py", line 329, in service
    task.service()
[...]
  File "/home/hbrown/workspace/spt/access_manager/access_manager/views/search.py", line 223, in cmis_main
    for result in repo.query(whole_query)
  File "/home/hbrown/.virtualenvs/access_manager_master/local/lib/python2.7/site-packages/cmislib/model.py", line 2467, in getContentStream
    assert(len(contentElements) == 1), 'Expected to find exactly one atom:content element.'
AssertionError: Expected to find exactly one atom:content element.

我正在使用检索内容。根据代码注释，我认为这是正确的API调用：

    >>> doc.getName()
    u'sample-b.pdf'
    >>> o = open('tmp.pdf', 'wb')
    >>> result = doc.getContentStream()
    >>> o.write(result.read())
    >>> result.close()
    >>> o.close()
    >>> import os.path
    >>> os.path.getsize('tmp.pdf')
    117248

cmislib中的python代码显然希望文档包含包含名为

content

的元素的XML，而我的没有

调用代码如下所示：

from cmislib import CmisClient

SERVER = "localhost"
url = "http://{0}:8080/alfresco/cmisatom".format(SERVER)
client = CmisClient(url, 'admin', 'alfresco')
repo = client.defaultRepository
results = repo.query("select * from wg:bulletin")
print results[0].getContentStream().read()

<atom:entry>
    <atom:author>
        <atom:name/>
    </atom:author>
    <atom:id>http://chemistry.apache.org/aWQtMQ==</atom:id>
    <atom:published>2013-04-12T03:22:38Z</atom:published>
    <atom:title>Query Result id-1</atom:title>
    <app:edited>2013-04-12T03:22:38Z</app:edited>
    <atom:updated>2013-04-12T03:22:38Z</atom:updated>
    <cmisra:object xmlns:ns3="http://docs.oasis-open.org/ns/cmis/messaging/200908/">
        <cmis:properties>
            <cmis:propertyInteger displayName="Content Stream Length" localName="contentStreamLength" propertyDefinitionId="cmis:contentStreamLength" queryName="b.cmis:contentStreamLength">
                <cmis:value>249</cmis:value>
            </cmis:propertyInteger>
            <cmis:propertyId displayName="Object Type Id" localName="objectTypeId" propertyDefinitionId="cmis:objectTypeId" queryName="b.cmis:objectTypeId">
                <cmis:value>D:wg:bulletin</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="Version Series Checked Out By" localName="versionSeriesCheckedOutBy" propertyDefinitionId="cmis:versionSeriesCheckedOutBy" queryName="b.cmis:versionSeriesCheckedOutBy"/>
            <cmis:propertyId displayName="Version Series Checked Out Id" localName="versionSeriesCheckedOutId" propertyDefinitionId="cmis:versionSeriesCheckedOutId" queryName="b.cmis:versionSeriesCheckedOutId"/>
            <cmis:propertyId displayName="Version series id" localName="versionSeriesId" propertyDefinitionId="cmis:versionSeriesId" queryName="b.cmis:versionSeriesId">
                <cmis:value>workspace://SpacesStore/1cd2053d-1fc4-4e85-b780-ba80284f0841</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="wg:account" localName="account" propertyDefinitionId="wg:account" queryName="b.wg:account"/>
            <cmis:propertyString displayName="Version Label" localName="versionLabel" propertyDefinitionId="cmis:versionLabel" queryName="b.cmis:versionLabel">
                <cmis:value>1.0</cmis:value>
            </cmis:propertyString>
            <cmis:propertyBoolean displayName="Is Latest Version" localName="isLatestVersion" propertyDefinitionId="cmis:isLatestVersion" queryName="b.cmis:isLatestVersion">
                <cmis:value>true</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyBoolean displayName="Is Version Series Checked Out" localName="isVersionSeriesCheckedOut" propertyDefinitionId="cmis:isVersionSeriesCheckedOut" queryName="b.cmis:isVersionSeriesCheckedOut">
                <cmis:value>false</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyString displayName="Last Modified By" localName="lastModifiedBy" propertyDefinitionId="cmis:lastModifiedBy" queryName="b.cmis:lastModifiedBy">
                <cmis:value>admin</cmis:value>
            </cmis:propertyString>
            <cmis:propertyString displayName="Created by" localName="createdBy" propertyDefinitionId="cmis:createdBy" queryName="b.cmis:createdBy">
                <cmis:value>admin</cmis:value>
            </cmis:propertyString>
            <cmis:propertyDateTime displayName="wg:displayUntil" localName="displayUntil" propertyDefinitionId="wg:displayUntil" queryName="b.wg:displayUntil"/>
            <cmis:propertyId displayName="Alfresco Node Ref" localName="nodeRef" propertyDefinitionId="alfcmis:nodeRef" queryName="b.alfcmis:nodeRef">
                <cmis:value>workspace://SpacesStore/1cd2053d-1fc4-4e85-b780-ba80284f0841</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="wg:email" localName="email" propertyDefinitionId="wg:email" queryName="b.wg:email"/>
            <cmis:propertyBoolean displayName="wg:isActive" localName="isActive" propertyDefinitionId="wg:isActive" queryName="b.wg:isActive">
                <cmis:value>false</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyString displayName="wg:username" localName="username" propertyDefinitionId="wg:username" queryName="b.wg:username"/>
            <cmis:propertyBoolean displayName="Is Latest Major Version" localName="isLatestMajorVersion" propertyDefinitionId="cmis:isLatestMajorVersion" queryName="b.cmis:isLatestMajorVersion">
                <cmis:value>true</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyId displayName="Content Stream Id" localName="contentStreamId" propertyDefinitionId="cmis:contentStreamId" queryName="b.cmis:contentStreamId">
                <cmis:value>store://2013/4/10/15/29/20b185d0-afae-4a7f-a06e-58eab399bdc9.bin</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="Name" localName="name" propertyDefinitionId="cmis:name" queryName="b.cmis:name">
                <cmis:value>.pythonrc</cmis:value>
            </cmis:propertyString>
            <cmis:propertyString displayName="Content Stream MIME Type" localName="contentStreamMimeType" propertyDefinitionId="cmis:contentStreamMimeType" queryName="b.cmis:contentStreamMimeType">
                <cmis:value>text/plain</cmis:value>
            </cmis:propertyString>
            <cmis:propertyDateTime displayName="Creation Date" localName="creationDate" propertyDefinitionId="cmis:creationDate" queryName="b.cmis:creationDate">
                <cmis:value>2013-04-10T15:29:18.146-04:00</cmis:value>
            </cmis:propertyDateTime>
            <cmis:propertyString displayName="Change token" localName="changeToken" propertyDefinitionId="cmis:changeToken" queryName="b.cmis:changeToken"/>
            <cmis:propertyString displayName="wg:state" localName="state" propertyDefinitionId="wg:state" queryName="b.wg:state"/>
            <cmis:propertyDateTime displayName="wg:displayFrom" localName="displayFrom" propertyDefinitionId="wg:displayFrom" queryName="b.wg:displayFrom"/>
            <cmis:propertyString displayName="Checkin Comment" localName="checkinComment" propertyDefinitionId="cmis:checkinComment" queryName="b.cmis:checkinComment"/>
            <cmis:propertyString displayName="wg:application" localName="application" propertyDefinitionId="wg:application" queryName="b.wg:application"/>
            <cmis:propertyId displayName="Object Id" localName="objectId" propertyDefinitionId="cmis:objectId" queryName="b.cmis:objectId">
                <cmis:value>workspace://SpacesStore/1cd2053d-1fc4-4e85-b780-ba80284f0841;1.0</cmis:value>
            </cmis:propertyId>
            <cmis:propertyBoolean displayName="Is Immutable" localName="isImmutable" propertyDefinitionId="cmis:isImmutable" queryName="b.cmis:isImmutable">
                <cmis:value>false</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyBoolean displayName="Is Major Version" localName="isMajorVersion" propertyDefinitionId="cmis:isMajorVersion" queryName="b.cmis:isMajorVersion">
                <cmis:value>true</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyString displayName="wg:institution" localName="institution" propertyDefinitionId="wg:institution" queryName="b.wg:institution"/>
            <cmis:propertyId displayName="Base Type Id" localName="baseTypeId" propertyDefinitionId="cmis:baseTypeId" queryName="b.cmis:baseTypeId">
                <cmis:value>cmis:document</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="Content Stream Filename" localName="contentStreamFileName" propertyDefinitionId="cmis:contentStreamFileName" queryName="b.cmis:contentStreamFileName">
                <cmis:value>.pythonrc</cmis:value>
            </cmis:propertyString>
            <cmis:propertyDateTime displayName="Last Modified Date" localName="lastModificationDate" propertyDefinitionId="cmis:lastModificationDate" queryName="b.cmis:lastModificationDate">
                <cmis:value>2013-04-10T15:29:23.384-04:00</cmis:value>
            </cmis:propertyDateTime>
        </cmis:properties>
    </cmisra:object>
</atom:entry>

在

getContentStream

中操作的XML如下所示：

from cmislib import CmisClient

SERVER = "localhost"
url = "http://{0}:8080/alfresco/cmisatom".format(SERVER)
client = CmisClient(url, 'admin', 'alfresco')
repo = client.defaultRepository
results = repo.query("select * from wg:bulletin")
print results[0].getContentStream().read()

<atom:entry>
    <atom:author>
        <atom:name/>
    </atom:author>
    <atom:id>http://chemistry.apache.org/aWQtMQ==</atom:id>
    <atom:published>2013-04-12T03:22:38Z</atom:published>
    <atom:title>Query Result id-1</atom:title>
    <app:edited>2013-04-12T03:22:38Z</app:edited>
    <atom:updated>2013-04-12T03:22:38Z</atom:updated>
    <cmisra:object xmlns:ns3="http://docs.oasis-open.org/ns/cmis/messaging/200908/">
        <cmis:properties>
            <cmis:propertyInteger displayName="Content Stream Length" localName="contentStreamLength" propertyDefinitionId="cmis:contentStreamLength" queryName="b.cmis:contentStreamLength">
                <cmis:value>249</cmis:value>
            </cmis:propertyInteger>
            <cmis:propertyId displayName="Object Type Id" localName="objectTypeId" propertyDefinitionId="cmis:objectTypeId" queryName="b.cmis:objectTypeId">
                <cmis:value>D:wg:bulletin</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="Version Series Checked Out By" localName="versionSeriesCheckedOutBy" propertyDefinitionId="cmis:versionSeriesCheckedOutBy" queryName="b.cmis:versionSeriesCheckedOutBy"/>
            <cmis:propertyId displayName="Version Series Checked Out Id" localName="versionSeriesCheckedOutId" propertyDefinitionId="cmis:versionSeriesCheckedOutId" queryName="b.cmis:versionSeriesCheckedOutId"/>
            <cmis:propertyId displayName="Version series id" localName="versionSeriesId" propertyDefinitionId="cmis:versionSeriesId" queryName="b.cmis:versionSeriesId">
                <cmis:value>workspace://SpacesStore/1cd2053d-1fc4-4e85-b780-ba80284f0841</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="wg:account" localName="account" propertyDefinitionId="wg:account" queryName="b.wg:account"/>
            <cmis:propertyString displayName="Version Label" localName="versionLabel" propertyDefinitionId="cmis:versionLabel" queryName="b.cmis:versionLabel">
                <cmis:value>1.0</cmis:value>
            </cmis:propertyString>
            <cmis:propertyBoolean displayName="Is Latest Version" localName="isLatestVersion" propertyDefinitionId="cmis:isLatestVersion" queryName="b.cmis:isLatestVersion">
                <cmis:value>true</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyBoolean displayName="Is Version Series Checked Out" localName="isVersionSeriesCheckedOut" propertyDefinitionId="cmis:isVersionSeriesCheckedOut" queryName="b.cmis:isVersionSeriesCheckedOut">
                <cmis:value>false</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyString displayName="Last Modified By" localName="lastModifiedBy" propertyDefinitionId="cmis:lastModifiedBy" queryName="b.cmis:lastModifiedBy">
                <cmis:value>admin</cmis:value>
            </cmis:propertyString>
            <cmis:propertyString displayName="Created by" localName="createdBy" propertyDefinitionId="cmis:createdBy" queryName="b.cmis:createdBy">
                <cmis:value>admin</cmis:value>
            </cmis:propertyString>
            <cmis:propertyDateTime displayName="wg:displayUntil" localName="displayUntil" propertyDefinitionId="wg:displayUntil" queryName="b.wg:displayUntil"/>
            <cmis:propertyId displayName="Alfresco Node Ref" localName="nodeRef" propertyDefinitionId="alfcmis:nodeRef" queryName="b.alfcmis:nodeRef">
                <cmis:value>workspace://SpacesStore/1cd2053d-1fc4-4e85-b780-ba80284f0841</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="wg:email" localName="email" propertyDefinitionId="wg:email" queryName="b.wg:email"/>
            <cmis:propertyBoolean displayName="wg:isActive" localName="isActive" propertyDefinitionId="wg:isActive" queryName="b.wg:isActive">
                <cmis:value>false</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyString displayName="wg:username" localName="username" propertyDefinitionId="wg:username" queryName="b.wg:username"/>
            <cmis:propertyBoolean displayName="Is Latest Major Version" localName="isLatestMajorVersion" propertyDefinitionId="cmis:isLatestMajorVersion" queryName="b.cmis:isLatestMajorVersion">
                <cmis:value>true</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyId displayName="Content Stream Id" localName="contentStreamId" propertyDefinitionId="cmis:contentStreamId" queryName="b.cmis:contentStreamId">
                <cmis:value>store://2013/4/10/15/29/20b185d0-afae-4a7f-a06e-58eab399bdc9.bin</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="Name" localName="name" propertyDefinitionId="cmis:name" queryName="b.cmis:name">
                <cmis:value>.pythonrc</cmis:value>
            </cmis:propertyString>
            <cmis:propertyString displayName="Content Stream MIME Type" localName="contentStreamMimeType" propertyDefinitionId="cmis:contentStreamMimeType" queryName="b.cmis:contentStreamMimeType">
                <cmis:value>text/plain</cmis:value>
            </cmis:propertyString>
            <cmis:propertyDateTime displayName="Creation Date" localName="creationDate" propertyDefinitionId="cmis:creationDate" queryName="b.cmis:creationDate">
                <cmis:value>2013-04-10T15:29:18.146-04:00</cmis:value>
            </cmis:propertyDateTime>
            <cmis:propertyString displayName="Change token" localName="changeToken" propertyDefinitionId="cmis:changeToken" queryName="b.cmis:changeToken"/>
            <cmis:propertyString displayName="wg:state" localName="state" propertyDefinitionId="wg:state" queryName="b.wg:state"/>
            <cmis:propertyDateTime displayName="wg:displayFrom" localName="displayFrom" propertyDefinitionId="wg:displayFrom" queryName="b.wg:displayFrom"/>
            <cmis:propertyString displayName="Checkin Comment" localName="checkinComment" propertyDefinitionId="cmis:checkinComment" queryName="b.cmis:checkinComment"/>
            <cmis:propertyString displayName="wg:application" localName="application" propertyDefinitionId="wg:application" queryName="b.wg:application"/>
            <cmis:propertyId displayName="Object Id" localName="objectId" propertyDefinitionId="cmis:objectId" queryName="b.cmis:objectId">
                <cmis:value>workspace://SpacesStore/1cd2053d-1fc4-4e85-b780-ba80284f0841;1.0</cmis:value>
            </cmis:propertyId>
            <cmis:propertyBoolean displayName="Is Immutable" localName="isImmutable" propertyDefinitionId="cmis:isImmutable" queryName="b.cmis:isImmutable">
                <cmis:value>false</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyBoolean displayName="Is Major Version" localName="isMajorVersion" propertyDefinitionId="cmis:isMajorVersion" queryName="b.cmis:isMajorVersion">
                <cmis:value>true</cmis:value>
            </cmis:propertyBoolean>
            <cmis:propertyString displayName="wg:institution" localName="institution" propertyDefinitionId="wg:institution" queryName="b.wg:institution"/>
            <cmis:propertyId displayName="Base Type Id" localName="baseTypeId" propertyDefinitionId="cmis:baseTypeId" queryName="b.cmis:baseTypeId">
                <cmis:value>cmis:document</cmis:value>
            </cmis:propertyId>
            <cmis:propertyString displayName="Content Stream Filename" localName="contentStreamFileName" propertyDefinitionId="cmis:contentStreamFileName" queryName="b.cmis:contentStreamFileName">
                <cmis:value>.pythonrc</cmis:value>
            </cmis:propertyString>
            <cmis:propertyDateTime displayName="Last Modified Date" localName="lastModificationDate" propertyDefinitionId="cmis:lastModificationDate" queryName="b.cmis:lastModificationDate">
                <cmis:value>2013-04-10T15:29:23.384-04:00</cmis:value>
            </cmis:propertyDateTime>
        </cmis:properties>
    </cmisra:object>
</atom:entry>

它被打破了。因此，我将代码更改为：

    results = list(repo.query(whole_query))
    for result in results:
        print(result.getAllowableActions())
        # or: result.reload()

    return [
        {
            'name': result.name,
            'content': result.getContentStream().read(),
            'content_mime_type': result.properties["cmis:contentStreamMimeType"],
        }
        for result in results
    ]

它成功了。我把它改成这样：

    results = list(repo.query(whole_query))
    for result in results:
        pass

    return [
        {
            'name': result.name,
            'content': result.getContentStream().read(),
            'content_mime_type': result.properties["cmis:contentStreamMimeType"],
        }
        for result in results
    ]

---

然后它就坏了。因此，XML在CMISLIB对象中似乎没有完全加载。

请尝试执行结果[0]。在调用getContentStream（）之前重新加载（）。这不应该是必需的，但它可能会强制对象使用content元素重新加载。

您手头上有返回的XML内容吗？还有你用来检索文档的代码，还有内容？@Will Abson:我提供了更详细的代码和输出，以帮助分析/探索。这很奇怪。我无法使用Alfresco 4.2.c、cmislib 0.5.1和使用我自己的自定义内容模型的对象在我的机器上重新创建此内容。你能分享你的内容模型，或者至少告诉我关于wg:bulletin的事吗？例如，它是否直接从cm:content继承？您是否使用了任何方面？另外，结果[0].getAllowableActions（）['canGetContentStream']返回什么？修订版：我不得不重新加载每个结果，而不仅仅是第一个。我尝试了

repo.reload（）

，

resultset.reload（）

，

resultset[0]。重新加载（至少有一个结果时）。仅对每个结果调用
reload
，我就不会出错。因此，我在github上提出了这个pull请求：