[Zope3-Users] local search engine

[christophe petit]

Hi,

Finally, I get to make appear in ZMI my local search engine product by
setting into the following creationCatalog.py source :


--------------------------------------------------------------------------------------------------
from zope.component import adapter
from zope.app.intid.interfaces import IIntIds
from zope.app.intid import IntIds
from zope.app.catalog.interfaces import ICatalog
from zope.app.catalog.catalog import Catalog
from zope.app.catalog.text import TextIndex
from zope.app.pagetemplate import ViewPageTemplateFile
from zope.app.container.interfaces import IObjectAddedEvent
from interfaces import ISearchz
from zope.app.component.site import LocalSiteManager
from zope.index.text.interfaces import ISearchableText

@adapter(ISearchz, IObjectAddedEvent)
def creationCatalog(site, event):
      sm = LocalSiteManager(site)
      intids = IntIds()
      sm['intids'] = intids
      sm.registerUtility(intids, IIntIds)

      catalog = Catalog()
      sm['catalog'] = catalog
      sm.registerUtility(catalog, ICatalog)

      fulltext = TextIndex(
          interface=ISearchableText,
          field_name='getSearchableText',
          field_callable=True
          )
      catalog[u'fulltext'] = fulltext
--------------------------------------------------------------------------------------------------

but now, problem happens when I try to add it on root folder.

Here's the Searchz.py source (in bold the several options that I tried to
use for making
appear, once product is added, an "update item" for updating the catalog) :

--------------------------------------------------------------------------------------------------
from zope.component import getUtility, queryMultiAdapter
from zope.interface import implements
from zope.publisher.browser import BrowserPage
from zope.dublincore.interfaces import IZopeDublinCore
from zope.index.text.interfaces import ISearchableText
from zope.traversing.browser import absoluteURL
from zope.app.catalog.interfaces import ICatalog
from zope.app.pagetemplate import ViewPageTemplateFile
from interfaces import ISearchz
from persistent import Persistent
from zope.app.folder import Folder
from zope.app.container.btree import BTreeContainer

*class Searchz(Persistent):
#class Searchz(**Folder):
#class Searchz(BTreeContainer):*
      implements(ISearchz)
      def update(self, query):
          catalog = getUtility(ICatalog)
          self.results = catalog.searchResults(fulltext=query)

      render = ViewPageTemplateFile ('search.pt')

      def __call__(self, query):
          self.update(query)
          return self.render()

      def getResultsInfo(self):
          for obj in self.results:
              icon = queryMultiAdapter((obj, self.request), name='zmi_icon')

          if icon is not None:
             icon = icon()

          title = None
          dc = IZopeDublinCore(obj, None)

          if dc is not None:
             title = dc.title
             text = ISearchableText(obj).getSearchableText()

          if len(text) > 100:
             text = text[:97] + u'...'

          yield {'icon': icon, 'title': title, 'text': text,
                 'absolute_url': absoluteURL(obj, self.request)}

class QueryPage(BrowserPage):
      template = ViewPageTemplateFile('query.pt')
      count = 0
      total = 0
      def __call__(self):
          if "UPDATE_SUBMIT" in self.request.form:
              d = "delete_first" in self.request.form
              self.count, self.total = self.context.update(delete=d)
          return self.template()
--------------------------------------------------------------------------------------------------

The only option which works is *"class Searchz(Persistent):" *but I can't
see the content
of a persistent object into ZMI. *Folder *and *BTreeContainer* doesn't
work...

I have to find a container which allows to create a folder with an update
item.

Could you tell me what I need to solve this ?

Thanks

ps: cc seb, j'espère avoir bien résumé :)





--------------------------------------------------------------------------------------------------
Subject: local search engine
To: zope3-users <zope3-users at zope.org>


Hi,

I try to implement a local search engine product with Catalog. For this, I
have followed the "Indexing and searching" part from "Web component
Development with Zope3" book.

My issue occurs when I add the product in ZMI ("A system error occurred")
with log :

ERROR SiteError https://site.com/@@contents.html
...
......
 File "/usr/lib/python2.4/site-packages/zope/tales/expressions.py", line
217, in __call__
    return self._eval(econtext)
  File "/usr/lib/python2.4/site-packages/zope/tales/expressions.py", line
211, in _eval
    return ob()
  File
"/usr/lib/python2.4/site-packages/zope/app/container/browser/contents.py",
line 80, in listContentInfo
    self.addObject()
  File
"/usr/lib/python2.4/site-packages/zope/app/container/browser/contents.py",
line 245, in addObject
    adding.action(request['type_name'], new)
  File
"/usr/lib/python2.4/site-packages/zope/app/container/browser/adding.py",
line 142, in action
    content = factory()
  File "/usr/lib/python2.4/site-packages/zope/component/factory.py", line
37, in __call__
    return self._callable(*args, **kw)
*TypeError: __init__() takes exactly 3 arguments (1 given)*

Here are the different sources :

__init__.py :

----------------------------------------------------------------------

from interfaces import ISearchz
from Searchz import Searchz, QueryPage

----------------------------------------------------------------------

Searchz.py :

----------------------------------------------------------------------

from zope.component import getUtility, queryMultiAdapter
from zope.interface import implements
from zope.publisher.browser import BrowserPage
from zope.dublincore.interfaces import IZopeDublinCore
from zope.index.text.interfaces import ISearchableText
from zope.traversing.browser import absoluteURL
from zope.app.catalog.interfaces import ICatalog
from zope.app.pagetemplate import ViewPageTemplateFile
from interfaces import ISearchz

class Searchz(BrowserPage):
      implements(ISearchz)
      def update(self, query):
          catalog = getUtility(ICatalog)
          self.results = catalog.searchResults(fulltext=query)

      render = ViewPageTemplateFile ('search.pt')

      def __call__(self, query):
          self.update(query)
          return self.render()

      def getResultsInfo(self):
          for obj in self.results:
              icon = queryMultiAdapter((obj, self.request), name='zmi_icon')

          if icon is not None:
             icon = icon()

          title = None
          dc = IZopeDublinCore(obj, None)

          if dc is not None:
             title = dc.title
             text = ISearchableText(obj).getSearchableText()

          if len(text) > 100:
             text = text[:97] + u'...'

          yield {'icon': icon, 'title': title, 'text': text,
                 'absolute_url': absoluteURL(obj, self.request)}

class QueryPage(BrowserPage):
      template = ViewPageTemplateFile('query.pt')
      count = 0
      total = 0
      def __call__(self):
          if "UPDATE_SUBMIT" in self.request.form:
              d = "delete_first" in self.request.form
              self.count, self.total = self.context.update(delete=d)
          return self.template()

----------------------------------------------------------------------

creationCatalog.py :

from zope.component import adapter
from zope.app.intid.interfaces import IIntIds
from zope.app.intid import IntIds
from zope.app.catalog.interfaces import ICatalog
from zope.app.catalog.catalog import Catalog
from zope.app.catalog.text import TextIndex
from zope.app.pagetemplate import ViewPageTemplateFile
from zope.app.container.interfaces import IObjectAddedEvent
from interfaces import ISearchz

@adapter(ISearchz, IObjectAddedEvent)
def creationCatalog(event):
      sm = event.object.getSiteManager()
      intids = IntIds()
      sm['intids'] = intids
      sm.registerUtility(intids, IIntIds)

      catalog = Catalog()
      sm['catalog'] = catalog
      sm.registerUtility(catalog, ICatalog)

      fulltext = TextIndex(
          interface=ISearchableText,
          field_name='getSearchableText',
          field_callable=True
          )
      catalog[u'fulltext'] = fulltext

----------------------------------------------------------------------

interfaces.py :

----------------------------------------------------------------------

from zope.interface import Interface
from zope.schema import Text, TextLine, Int
from zope.app.container.constraints import ItemTypePrecondition
from zope.app.container.interfaces import IContainer

class ISearchz(Interface):
    def update():
        """
        update catalog
        """
    def getResultsInfo():
        """
        query for searching in catalog
        """
    def __setitem__(key, value):
        """
        add page
        """
        __setitem__.precondition = ItemTypePrecondition(ISearchz)

----------------------------------------------------------------------

and configure.zcml :

----------------------------------------------------------------------

<configure xmlns="http://namespaces.zope.org/zope"
    xmlns:browser="http://namespaces.zope.org/browser"
    i18n_domain="searchz">

  <interface
      interface=".interfaces.ISearchz"
      type="zope.app.content.interfaces.IContentType" />

  <class
      class=".Searchz">
    <implements
        interface=".interfaces.ISearchz" />
    <implements
        interface="zope.annotation.interfaces.IAttributeAnnotatable" />
    <factory
        id="searchz.Searchz"
        title="Search Engine"
        description="Search Engine" />
    <require
        permission="zope.Public"
        interface=".interfaces.ISearchz" />
    <require
        permission="zope.ManageContent"
        set_schema=".interfaces.ISearchz" />
  </class>

  <browser:icon name="zmi_icon"
      for=".interfaces.ISearchz"
      file="search.gif" />

  <browser:addMenuItem
      class=".Searchz"
      title="Search Engine"
      description="Search Engine"
      permission="zope.ManageContent" />

  <browser:containerViews
      for=".interfaces.ISearchz"
      index="zope.View"
      contents="zope.View"
      add="zope.ManageContent" />

  <browser:addform
      label="Add search engine"
      name="addsearch.html"
      schema=".interfaces.ISearchz"
      content_factory="searchz.Searchz"
      permission="zope.ManageContent" />

  <browser:page
      for=".interfaces.ISearchz"
      name="query.html"
      class=".QueryPage"
      permission="zope.ManageContent"
      menu="zmi_views"
      title="Update Catalog" />

*<subscriber handler=".creationCatalog.creationCatalog" />*

</configure>

----------------------------------------------------------------------

Could you see what's wrong at first sight ?

Thanks
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