2 # -*- encoding: utf-8 -*-
4 from tools import flatten
6 class expression(object):
8 parse a domain expression
11 >>> e = [('foo', '=', 'bar')]
12 >>> expression(e).parse().to_sql()
14 >>> e = [('id', 'in', [1,2,3])]
15 >>> expression(e).parse().to_sql()
17 >>> e = [('field', '=', 'value'), ('field', '<>', 'value')]
18 >>> expression(e).parse().to_sql()
19 '( field = value AND field <> value )'
20 >>> e = [('&', ('field', '<', 'value'), ('field', '>', 'value'))]
21 >>> expression(e).parse().to_sql()
22 '( field < value AND field > value )'
23 >>> e = [('|', ('field', '=', 'value'), ('field', '=', 'value'))]
24 >>> expression(e).parse().to_sql()
25 '( field = value OR field = value )'
26 >>> e = [('&', ('field1', '=', 'value'), ('field2', '=', 'value'), ('|', ('field3', '<>', 'value'), ('field4', '=', 'value')))]
27 >>> expression(e).parse().to_sql()
28 '( field1 = value AND field2 = value AND ( field3 <> value OR field4 = value ) )'
29 >>> e = [('&', ('|', ('a', '=', '1'), ('b', '=', '2')), ('|', ('c', '=', '3'), ('d', '=', '4')))]
30 >>> expression(e).parse().to_sql()
31 '( ( a = 1 OR b = 2 ) AND ( c = 3 OR d = 4 ) )'
32 >>> e = [('|', (('a', '=', '1'), ('b', '=', '2')), (('c', '=', '3'), ('d', '=', '4')))]
33 >>> expression(e).parse().to_sql()
34 '( ( a = 1 AND b = 2 ) OR ( c = 3 AND d = 4 ) )'
35 >>> expression(e).parse().get_tables()
37 >>> expression('fail').parse().to_sql()
38 Traceback (most recent call last):
40 ValueError: Bad expression: 'fail'
41 >>> e = [('fail', 'is', 'True')]
42 >>> expression(e).parse().to_sql()
43 Traceback (most recent call last):
45 ValueError: Bad expression: ('&', ('fail', 'is', 'True'))
48 def _is_operator(self, element):
49 return isinstance(element, str) \
50 and element in ['&','|']
52 def _is_leaf(self, element):
53 return isinstance(element, tuple) \
54 and len(element) == 3 \
55 and element[1] in ('=', '!=', '<>', '<=', '<', '>', '>=', '=like', 'like', 'not like', 'ilike', 'not ilike', 'in', 'not in', 'child_of')
57 def _is_expression(self, element):
58 return isinstance(element, tuple) \
59 and len(element) > 2 \
60 and self._is_operator(element[0])
63 def __execute_recursive_in(self, cr, s, f, w, ids):
65 for i in range(0, len(ids), cr.IN_MAX):
66 subids = ids[i:i+cr.IN_MAX]
67 cr.execute('SELECT "%s"' \
69 ' WHERE "%s" in (%s)' % (s, f, w, ','.join(['%d']*len(subids))),
71 res.extend([r[0] for r in cr.fetchall()])
75 def __init__(self, exp):
76 if exp and isinstance(exp, tuple):
77 if not self._is_leaf(exp) and not self._is_operator(exp[0]):
79 if exp and isinstance(exp, list):
80 if len(exp) == 1 and self._is_leaf(exp[0]):
83 if not self._is_operator(exp[0][0]):
97 self.__left, self.__right = None, None
98 if self._is_leaf(self.__exp):
99 self.__left, self.__operator, self.__right = self.__exp
100 if isinstance(self.__right, list):
101 self.__right = tuple(self.__right)
102 elif exp and not self._is_expression(self.__exp):
103 raise ValueError, 'Bad expression: %r' % (self.__exp,)
105 def parse(self, cr, uid, table, context):
107 def _rec_get(ids, table, parent):
110 ids2 = table.search(cr, uid, [(parent, 'in', ids)], context=context)
111 return ids + _rec_get(ids2, table, parent)
116 if self._is_leaf(self.__exp):
118 self.__tables.append(self.__table._table)
119 if self.__left in table._inherit_fields:
120 self.__table = table.pool.get(table._inherit_fields[self.__left][0])
121 if self.__table._table not in self.__tables:
122 self.__tables.append(self.__table._table)
123 self.__joins.append('%s.%s' % (table._table, table._inherits[self.__table._name]))
124 fargs = self.__left.split('.', 1)
125 field = self.__table._columns.get(fargs[0], False)
127 if self.__left == 'id' and self.__operator == 'child_of':
128 self.__right += _rec_get(self.__right, self.__table, self.__table._parent_name)
129 self.__operator = 'in'
132 if field._type == 'many2one':
133 self.__left = fargs[0]
134 self.__right = table.pool.get(field._obj).search(cr, uid, [(fargs[1], self.__operator, self.__right)], context=context)
135 self.__operator = 'in'
138 field_obj = table.pool.get(field._obj)
139 if field._properties:
140 # this is a function field
141 if not field._fnct_search and not field.store:
142 # the function field doesn't provide a search function and doesn't store values in the database, so we must ignore it : we generate a dummy leaf
143 self.__left, self__operator, self.__right = 1, '=', 1
144 self.__exp = '' # force to generate an empty sql expression
146 # we need to replace this leaf to a '&' expression
147 # we clone ourself...
149 newexp = copy.copy(self)
151 self.__tables, self.__joins = [], []
154 if field._fnct_search:
155 subexp = field.search(cr, uid, table, self.__left, [self.__exp])
156 self.__children.append(expression(subexp).parse(cr, uid, table, context))
158 self.__children.append(newexp)
160 self.__left, self.__right = None, None
161 self.__operator = '&'
162 self.__exp = ('&',) + tuple( [tuple(e.__exp) for e in self.__children] )
164 elif field._type == 'one2many':
165 if isinstance(self.__right, basestring):
166 ids2 = [x[0] for x in field_obj.name_search(cr, uid, self.__right, [], self.__operator)]
170 self.__left, self.__operator, self.__right = 'id', '=', '0'
172 self.__left, self.__operator, self.__right = 'id', 'in', self.__execute_recursive_in(cr, field._fields_id, field_obj._table, 'id', ids2)
174 elif field._type == 'many2many':
176 if self.__operator == 'child_of':
177 if isinstance(self.__right, basestring):
178 ids2 = [x[0] for x in field_obj.name_search(cr, uid, self.__right, [], 'like')]
182 def _rec_convert(ids):
183 if field_obj == table:
185 return self.__execute_recursive_in(cr, field._id1, field._rel, field._id2, ids)
187 self.__left, self.__operator, self.__right = 'id', 'in', _rec_convert(ids2 + _rec_get(ids2, field_obj, self.__table._parent_name))
189 if isinstance(self.__right, basestring):
190 res_ids = [x[0] for x in field_obj.name_search(cr, uid, self.__right, [], self.__operator)]
192 res_ids = self.__right
193 self.__left, self.__operator, self.__right = 'id', 'in', self.__execute_recursive_in(cr, field._id1, field._rel, field._id2, res_ids) or [0]
194 elif field._type == 'many2one':
195 if self.__operator == 'child_of':
196 if isinstance(self.__right, basestring):
197 ids2 = [x[0] for x in field_obj.search_name(cr, uid, self.__right, [], 'like')]
199 ids2 = list(self.__right)
201 self.__operator = 'in'
202 if field._obj <> self.__table._name:
203 self.__right = ids2 + _rec_get(ids2, field_obj, self.__table._parent_name)
205 self.__right = ids2 + _rec_get(ids2, self.__table, self.__left)
208 if isinstance(self.__right, basestring):
209 res_ids = field_obj.name_search(cr, uid, self.__right, [], self.__operator)
210 self.__operator = 'in'
211 self.__right = map(lambda x: x[0], res_ids)
215 if self.__operator in ('like', 'ilike', 'not like', 'not ilike'):
216 self.__right = '%%%s%%' % self.__right
218 query1 = '( SELECT res_id' \
219 ' FROM ir_translation' \
223 ' AND value ' + self.__operator + ' %s' \
226 ' FROM "' + self.__table._table + '"' \
227 ' WHERE "' + self.__left + '" ' + self.__operator + ' %s' \
229 query2 = [self.__table._name + ',' + self.__left,
230 context.get('lang', False) or 'en_US',
237 self.__operator = 'inselect'
238 self.__right = (query1, query2,)
241 elif self._is_expression(self.__exp):
242 self.__operator = self.__exp[0]
244 for element in self.__exp[1:]:
245 if not self._is_operator(element):
246 self.__children.append(expression(element).parse(cr, uid, table, context))
252 elif self._is_leaf(self.__exp):
253 if self.__operator == 'inselect':
254 query = '(%s.%s in (%s))' % (self.__table._table, self.__left, self.__right[0])
255 params = self.__right[1]
256 elif self.__operator in ['in', 'not in']:
257 params = self.__right[:]
258 len_before = len(params)
259 for i in range(len_before)[::-1]:
260 if params[i] == False:
263 len_after = len(params)
264 check_nulls = len_after <> len_before
268 if self.__left == 'id':
269 instr = ','.join(['%d'] * len_after)
271 instr = ','.join([self.__table._columns[self.__left]._symbol_set[0]] * len_after)
273 query = '(%s.%s %s (%s))' % (self.__table._table, self.__left, self.__operator, instr)
276 query = '(%s OR %s IS NULL)' % (query, self.__left)
279 if self.__right is False and self.__operator == '=':
280 query = '%s IS NULL' % self.__left
281 elif self.__right is False and self.__operator == '<>':
282 query = '%s IS NOT NULL' % self.__left
284 if self.__left == 'id':
285 query = '%s.id %s %%s' % (self.__table._table, self.__operator)
286 params = self.__right
288 like = self.__operator in ('like', 'ilike', 'not like', 'not ilike')
290 op = self.__operator == '=like' and 'like' or self.__operator
291 if self.__left in self.__table._columns:
292 format = like and '%s' or self.__table._columns[self.__left]._symbol_set[0]
293 query = '(%s.%s %s %s)' % (self.__table._table, self.__left, op, format)
295 query = "(%s.%s %s '%s')" % (self.__table._table, self.__left, op, self.__right)
299 if isinstance(self.__right, str):
300 str_utf8 = self.__right
301 elif isinstance(self.__right, unicode):
302 str_utf8 = self.__right.encode('utf-8')
304 str_utf8 = str(self.__right)
305 params = '%%%s%%' % str_utf8
306 add_null = not str_utf8
307 elif self.__left in self.__table._columns:
308 params = self.__table._columns[self.__left]._symbol_set[1](self.__right)
311 query = '(%s OR %s IS NULL)' % (query, self.__left)
313 joins = ' AND '.join(map(lambda j: '%s.id = %s' % (self.__table._table, j), self.__joins))
315 query = '(%s AND (%s))' % (joins, query)
316 if isinstance(params, basestring):
318 return (query, params)
321 children = [child.to_sql() for child in self.__children]
322 params = flatten([child[1] for child in children])
323 query = "( %s )" % (" %s " % {'&' : 'AND', '|' : 'OR' }[self.__operator]).join([child[0] for child in children if child[0]])
324 return (query, params)
326 def __get_tables(self):
327 return self.__tables + [child.__get_tables() for child in self.__children]
329 def get_tables(self):
330 return [ '"%s"' % t for t in set(flatten(self.__get_tables()))]
334 if __name__ == '__main__':
339 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: