getListContentForData function added to lists helper. It allows to manually set a list of entities which is to be displayed on the view. Previously, the only function was getListContent, but it retrived data on its own by a single query. The new function can be useful whenever it is impossible or very awkward to obtain entities in such a way (for example more sophisticated SQL statements). Additionally, the getListContent function is reconstructed so that it collects the data first and then calls getListContentForData.

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"""

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Extracts the version of the PostgreSQL server.

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"""

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import re

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VERSION_RE = re.compile(r'PostgreSQL (\d+)\.(\d+)\.')

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def get_version(cursor):

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    """

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    Returns a tuple representing the major and minor version number of the

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    server. For example, (7, 4) or (8, 3).

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    """

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    cursor.execute("SELECT version()")

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    version = cursor.fetchone()[0]

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    major, minor = VERSION_RE.search(version).groups()

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    return int(major), int(minor)

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