API docs for “nevow.query.QueryContext”

Line #	Kind	Name	Docs
20	Method	patternGenerator	Returns a pseudo-Tag which will generate clones of matching
23	Method	allPatterns	Return a list of all matching pattern tags, cloned.
29	Method	onePattern	Return a single matching pattern, cloned.

Inherited from Adapter:

Line #	Kind	Name	Docs
168	Method	__init__	Set my 'original' attribute to be the object I am adapting.
173	Method	__conform__	I forward __conform__ to self.original if it has it, otherwise I
182	Method	isuper	Forward isuper to self.original

Line #	Kind	Name	Docs
173	Method	__conform__	I forward __conform__ to self.original if it has it, otherwise I
168	Method	__init__	Set my 'original' attribute to be the object I am adapting.
23	Method	allPatterns	Return a list of all matching pattern tags, cloned.
182	Method	isuper	Forward isuper to self.original
29	Method	onePattern	Return a single matching pattern, cloned.
20	Method	patternGenerator	Returns a pseudo-Tag which will generate clones of matching

def patternGenerator(self, pattern, default=None): (source)

Returns a pseudo-Tag which will generate clones of matching pattern tags forever, looping around to the beginning when running out of unique matches.

If no matches are found, and default is None, raise an exception, otherwise, generate clones of default forever.

You can use the normal stan syntax on the return value.

Useful to find repeating pattern elements. Example rendering function:

>>> def simpleSequence(context, data):
...   pattern = IQ(context).patternGenerator('item')
...   return [pattern(data=element) for element in data]

def allPatterns(self, pattern): (source)

Return a list of all matching pattern tags, cloned.

Useful if you just want to insert them in the output in one place.

E.g. the sequence renderer's header and footer are found with this.

def onePattern(self, pattern): (source)

Return a single matching pattern, cloned. If there is more than one matching pattern or no matching patterns, raise an exception.

Useful in the case where you want to locate one and only one sub-tag and do something with it.

Class n.q.QueryContext(tpc.Adapter):