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GeezerVison is showing github.com — document-api-python/tableaudocumentapi/connection.py at master · crobric/document-api-python Expand file tree/ Copy pathconnection.pyMore file actions 208 lines (163 loc) · 5.61 KB / Copy pathconnection.pyFile metadata and controls208 lines (163 loc) · 5.61 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 import xml.etree.ElementTree as ET from tableaudocumentapi.dbclass import is_valid_dbclass class Connection(object): """A class representing connections inside Data Sources.""" def __init__(self, connxml): """Connection is usually instantiated by passing in connection elements in a Data Source. If creating a connection from scratch you can call `from_attributes` passing in the connection attributes. """ self._connectionXML = connxml self._dbname = connxml.get('dbname') self._server = connxml.get('server') self._username = connxml.get('username') self._authentication = connxml.get('authentication') self._class = connxml.get('class') self._port = connxml.get('port', None) self._query_band = connxml.get('query-band-spec', None) self._initial_sql = connxml.get('one-time-sql', None) def __repr__(self): return "'<Connection server='{}' dbname='{}' @ {}>'".format(self._server, self._dbname, hex(id(self))) @classmethod def from_attributes(cls, server, dbname, username, dbclass, port=None, query_band=None, initial_sql=None, authentication=''): """Creates a new connection that can be added into a Data Source. defaults to `''` which will be treated as 'prompt' by Tableau.""" root = ET.Element('connection', authentication=authentication) xml = cls(root) xml.server = server xml.dbname = dbname xml.username = username xml.dbclass = dbclass xml.port = port xml.query_band = query_band xml.initial_sql = initial_sql return xml @property def dbname(self): """Database name for the connection. Not the table name.""" return self._dbname @dbname.setter def dbname(self, value): """ Set the connection's database name property. Args: value: New name of the database. String. Returns: Nothing. """ self._dbname = value self._connectionXML.set('dbname', value) @property def server(self): """Hostname or IP address of the database server. May also be a URL in some connection types.""" return self._server @server.setter def server(self, value): """ Set the connection's server property. Args: value: New server. String. Returns: Nothing. """ self._server = value self._connectionXML.set('server', value) @property def username(self): """Username used to authenticate to the database.""" return self._username @username.setter def username(self, value): """ Set the connection's username property. Args: value: New username value. String. Returns: Nothing. """ self._username = value self._connectionXML.set('username', value) @property def authentication(self): return self._authentication @property def dbclass(self): """The type of connection (e.g. 'MySQL', 'Postgresql'). A complete list can be found in dbclass.py""" return self._class @dbclass.setter def dbclass(self, value): """Set the connection's dbclass property. Args: value: New dbclass value. String. Returns: Nothing. """ if not is_valid_dbclass(value): raise AttributeError("'{}' is not a valid database type".format(value)) self._class = value self._connectionXML.set('class', value) @property def port(self): """Port used to connect to the database.""" return self._port @port.setter def port(self, value): """Set the connection's port property. Args: value: New port value. String. Returns: Nothing. """ self._port = value # If port is None we remove the element and don't write it to XML if value is None: try: del self._connectionXML.attrib['port'] except KeyError: pass else: self._connectionXML.set('port', value) @property def query_band(self): """Query band passed on connection to database.""" return self._query_band @query_band.setter def query_band(self, value): """Set the connection's query_band property. Args: value: New query_band value. String. Returns: Nothing. """ self._query_band = value # If query band is None we remove the element and don't write it to XML if value is None: try: del self._connectionXML.attrib['query-band-spec'] except KeyError: pass else: self._connectionXML.set('query-band-spec', value) @property def initial_sql(self): """Initial SQL to be run.""" return self._initial_sql @initial_sql.setter def initial_sql(self, value): """Set the connection's initial_sql property. Args: value: New initial_sql value. String. Returns: Nothing. """ self._initial_sql = value # If initial_sql is None we remove the element and don't write it to XML if value is None: try: del self._connectionXML.attrib['one-time-sql'] except KeyError: pass else: self._connectionXML.set('one-time-sql', value) |
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