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https://github.com/searxng/searxng.git
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86b4d2f2d0
We have been using a static type checker (pyright) for a long time, but its check was not yet a prerequisite for passing the quality gate. It was checked in the CI, but the error messages were only logged. As is always the case in life, with checks that you have to do but which have no consequences; you neglect them :-) We didn't activate the checks back then because we (even today) have too much monkey patching in our code (not only in the engines, httpx and others objects are also affected). We want to replace monkey patching with clear interfaces for a long time, the basis for this is increased typing and we can only achieve this if we make type checking an integral part of the quality gate. This PR activates the type check; in order to pass the check, a few typings were corrected in the code, but most type inconsistencies were deactivated via inline comments. This was particularly necessary in places where the code uses properties that stick to the objects (monkey patching). The sticking of properties only happens in a few places, but the access to these properties extends over the entire code, which is why there are many `# type: ignore` markers in the code ... which we will hopefully be able to remove again successively in the future. Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
89 lines
2 KiB
Python
89 lines
2 KiB
Python
# SPDX-License-Identifier: AGPL-3.0-or-later
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"""PostgreSQL is a powerful and robust open source database. Before configuring
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the PostgreSQL engine, you must install the dependency ``psychopg2``.
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Example
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=======
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Below is an example configuration:
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.. code:: yaml
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- name: my_database
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engine: postgresql
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database: my_database
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username: searxng
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password: password
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query_str: 'SELECT * from my_table WHERE my_column = %(query)s'
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Implementations
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===============
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"""
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try:
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import psycopg2 # type: ignore
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except ImportError:
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# import error is ignored because the admin has to install postgresql
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# manually to use the engine.
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pass
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engine_type = 'offline'
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host = "127.0.0.1"
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port = "5432"
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database = ""
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username = ""
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password = ""
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query_str = ""
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limit = 10
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paging = True
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result_template = 'key-value.html'
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_connection = None
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def init(engine_settings):
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global _connection # pylint: disable=global-statement
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if 'query_str' not in engine_settings:
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raise ValueError('query_str cannot be empty')
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if not engine_settings['query_str'].lower().startswith('select '):
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raise ValueError('only SELECT query is supported')
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_connection = psycopg2.connect(
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database=database,
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user=username,
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password=password,
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host=host,
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port=port,
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)
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def search(query, params):
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query_params = {'query': query}
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query_to_run = query_str + ' LIMIT {0} OFFSET {1}'.format(limit, (params['pageno'] - 1) * limit)
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with _connection: # type: ignore
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with _connection.cursor() as cur:
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cur.execute(query_to_run, query_params)
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return _fetch_results(cur)
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def _fetch_results(cur):
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results = []
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titles = []
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try:
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titles = [column_desc.name for column_desc in cur.description]
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for res in cur:
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result = dict(zip(titles, map(str, res)))
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result['template'] = result_template
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results.append(result)
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# no results to fetch
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except psycopg2.ProgrammingError:
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pass
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return results
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