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
|
# -*- coding: utf-8 -*-
"""
/***************************************************************************
Name : DB Manager plugin for virtual layers
Date : December 2015
copyright : (C) 2015 by Hugo Mercier
email : hugo dot mercier at oslandia dot com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
"""
# this will disable the dbplugin if the connector raise an ImportError
from .connector import VLayerConnector
from qgis.PyQt.QtCore import QCoreApplication
from qgis.PyQt.QtGui import QIcon
from qgis.core import QgsApplication, QgsVectorLayer, QgsProject, QgsVirtualLayerDefinition
from ..plugin import DBPlugin, Database, Table, VectorTable, TableField
def classFactory():
return VLayerDBPlugin
class VLayerDBPlugin(DBPlugin):
@classmethod
def icon(self):
return QgsApplication.getThemeIcon("/mIconVirtualLayer.svg")
def connectionIcon(self):
return QgsApplication.getThemeIcon("/providerQgis.svg")
@classmethod
def typeName(self):
return 'vlayers'
@classmethod
def typeNameString(self):
return QCoreApplication.translate('db_manager', 'Virtual Layers')
@classmethod
def providerName(self):
return 'virtual'
@classmethod
def connectionSettingsKey(self):
return 'vlayers'
@classmethod
def connections(self):
return [VLayerDBPlugin(QCoreApplication.translate('db_manager', 'Project layers'))]
def databasesFactory(self, connection, uri):
return FakeDatabase(connection, uri)
def database(self):
return self.db
# def info( self ):
def connect(self, parent=None):
self.connectToUri("qgis")
return True
class FakeDatabase(Database):
def __init__(self, connection, uri):
Database.__init__(self, connection, uri)
def connectorsFactory(self, uri):
return VLayerConnector(uri)
def dataTablesFactory(self, row, db, schema=None):
return LTable(row, db, schema)
def vectorTablesFactory(self, row, db, schema=None):
return LVectorTable(row, db, schema)
def rasterTablesFactory(self, row, db, schema=None):
return None
def info(self):
from .info_model import LDatabaseInfo
return LDatabaseInfo(self)
def sqlResultModel(self, sql, parent):
from .data_model import LSqlResultModel
return LSqlResultModel(self, sql, parent)
def sqlResultModelAsync(self, sql, parent):
from .data_model import LSqlResultModelAsync
return LSqlResultModelAsync(self, sql, parent)
def toSqlLayer(self, sql, geomCol, uniqueCol, layerName="QueryLayer", layerType=None, avoidSelectById=False, _filter=""):
df = QgsVirtualLayerDefinition()
df.setQuery(sql)
if uniqueCol is not None:
uniqueCol = uniqueCol.strip('"').replace('""', '"')
df.setUid(uniqueCol)
if geomCol is not None:
df.setGeometryField(geomCol)
vl = QgsVectorLayer(df.toString(), layerName, "virtual")
if _filter:
vl.setSubsetString(_filter)
return vl
def registerDatabaseActions(self, mainWindow):
return
def runAction(self, action):
return
def uniqueIdFunction(self):
return None
def explicitSpatialIndex(self):
return True
def spatialIndexClause(self, src_table, src_column, dest_table, dest_column):
return '"%s"._search_frame_ = "%s"."%s"' % (src_table, dest_table, dest_column)
def supportsComment(self):
return False
class LTable(Table):
def __init__(self, row, db, schema=None):
Table.__init__(self, db, None)
self.name, self.isView, self.isSysTable = row
def tableFieldsFactory(self, row, table):
return LTableField(row, table)
def tableDataModel(self, parent):
from .data_model import LTableDataModel
return LTableDataModel(self, parent)
def canBeAddedToCanvas(self):
return False
class LVectorTable(LTable, VectorTable):
def __init__(self, row, db, schema=None):
LTable.__init__(self, row[:-5], db, schema)
VectorTable.__init__(self, db, schema)
# SpatiaLite does case-insensitive checks for table names, but the
# SL provider didn't do the same in Qgis < 1.9, so self.geomTableName
# stores the table name like stored in the geometry_columns table
self.geomTableName, self.geomColumn, self.geomType, self.geomDim, self.srid = row[
-5:]
def uri(self):
uri = self.database().uri()
uri.setDataSource('', self.geomTableName, self.geomColumn)
return uri
def hasSpatialIndex(self, geom_column=None):
return True
def createSpatialIndex(self, geom_column=None):
return
def deleteSpatialIndex(self, geom_column=None):
return
def refreshTableEstimatedExtent(self):
self.extent = self.database().connector.getTableExtent(
("id", self.geomTableName), None)
def runAction(self, action):
return
def toMapLayer(self):
return QgsProject.instance().mapLayer(self.geomTableName)
class LTableField(TableField):
def __init__(self, row, table):
TableField.__init__(self, table)
self.num, self.name, self.dataType, self.notNull, self.default, self.primaryKey = row
self.hasDefault = self.default
|
