Mercurial > getan > getan
annotate getan/backend.py @ 284:561441fde2ac
Set unique constraint on project key
Thanks to Tom Gottfried
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Tue, 16 Apr 2013 11:51:35 +0200 |
parents | 36b9f2d31810 |
children | 328ec66517b0 |
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1 # -*- coding: utf-8 -*- |
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2 # |
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3 # (c) 2008, 2009, 2010 by |
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4 # Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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5 # Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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6 # (c) 2011 Björn Ricks <bjoern.ricks@intevation.de> |
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7 # |
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8 # This is Free Software licensed unter the terms of GPLv3 or later. |
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9 # For details see LICENSE coming with the source of 'getan'. |
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10 # |
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11 |
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12 import logging |
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13 import os |
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14 |
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15 try: |
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16 import sqlite3 as db |
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17 except ImportError: |
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18 from pysqlite2 import dbapi2 as db |
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19 |
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20 from getan.project import Project, Entry |
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21 |
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22 DEFAULT_DATABASE = "time.db" |
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23 |
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24 CREATE_TABLES = [ |
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25 """ |
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26 CREATE TABLE projects ( |
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27 id INTEGER PRIMARY KEY AUTOINCREMENT, |
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28 key VARCHAR(16) NOT NULL CONSTRAINT unique_key UNIQUE, |
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29 description VARCHAR(256), |
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30 active BOOLEAN DEFAULT 1 |
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31 ) |
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32 """, |
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33 """ |
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34 CREATE TABLE entries ( |
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35 id INTEGER PRIMARY KEY AUTOINCREMENT, |
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36 project_id INTEGER REFERENCES projects(id), |
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37 start_time TIMESTAMP NOT NULL, |
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38 stop_time TIMESTAMP NOT NULL, |
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39 description VARCHAR(256), |
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40 |
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41 CHECK (strftime('%s', start_time) <= strftime('%s', stop_time)) |
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42 ) |
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43 """ |
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44 ] |
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45 |
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46 LOAD_ACTIVE_PROJECTS = ''' |
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47 SELECT id, key, description, total |
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48 FROM projects LEFT JOIN |
144 | 49 (SELECT |
50 project_id, | |
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51 sum(strftime('%s', stop_time) - strftime('%s', start_time)) AS total |
144 | 52 FROM entries |
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53 GROUP BY project_id) ON project_id = id |
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54 WHERE active |
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55 ''' |
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56 |
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57 LOAD_PROJECT_ENTRIES = ''' |
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58 SELECT |
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59 id, |
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60 project_id, |
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61 start_time as "[timestamp]", |
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62 stop_time as "[timestamp]", |
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63 description |
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64 FROM |
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65 entries |
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66 WHERE |
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67 project_id = %i |
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68 ORDER BY |
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69 id |
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70 DESC |
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71 ''' |
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72 |
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73 INSERT_PROJECT_ENTRY = ''' |
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74 INSERT INTO entries (project_id, start_time, stop_time, description) |
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75 VALUES(?,?,?,?) |
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76 ''' |
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77 |
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78 INSERT_PROJECT = ''' |
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79 INSERT INTO projects (key, description, active) VALUES (?,?,1) |
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80 ''' |
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81 |
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82 DELETE_PROJECT_ENTRY = 'DELETE FROM entries WHERE id = %i' |
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83 |
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84 MOVE_ENTRY = 'UPDATE entries SET project_id = ? WHERE id = ?' |
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85 |
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86 UPDATE_ENTRY = 'UPDATE entries SET description = ? WHERE id = ?' |
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87 |
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88 UPDATE_PROJECT = "UPDATE projects SET key = ?, description = ? WHERE id = ?" |
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89 |
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90 logger = logging.getLogger() |
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91 |
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92 class InvalidProjectKeyError(Exception): |
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93 pass |
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94 |
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95 class Backend(object): |
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96 |
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97 def __init__(self, database = DEFAULT_DATABASE): |
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98 self.database = database |
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99 self.ensure_exists() |
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100 self.con = db.connect(database, |
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101 detect_types=db.PARSE_DECLTYPES | |
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102 db.PARSE_COLNAMES) |
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103 self.con.text_factory = lambda x: unicode(x, "utf-8", "ignore") |
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104 |
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105 |
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106 def ensure_exists(self): |
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107 """ Creates the database file if it does not exist. """ |
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108 if os.path.isfile(self.database): return |
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109 |
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110 con, cur = None, None |
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111 try: |
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112 con = db.connect(self.database); |
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113 cur = con.cursor() |
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114 try: |
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115 for sql in CREATE_TABLES: |
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116 cur.execute(sql) |
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117 con.commit() |
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118 except: |
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119 con.rollback() |
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120 raise |
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121 finally: |
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122 if cur: cur.close() |
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123 if con: con.close() |
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124 |
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125 |
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126 def load_projects(self): |
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127 """ Loads active projects from database and returns them as array """ |
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128 logger.debug("load active projects from database.") |
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129 cur = None |
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130 try : |
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131 cur = self.con.cursor() |
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132 cur.execute(LOAD_ACTIVE_PROJECTS) |
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133 |
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134 projects = [] |
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135 while True: |
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136 row = cur.fetchone() |
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137 |
135
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138 if not row: |
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139 break |
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140 # check key |
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141 if not row[1]: |
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142 raise InvalidProjectKeyError("Project with id %s needs " \ |
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143 "a key" % row[0]) |
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144 proj = Project(*row) |
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145 proj.entries = self.load_entries(proj.id) |
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146 projects.append(proj) |
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147 |
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148 logger.info("found %i active projects." % len(projects)) |
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149 return projects |
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150 |
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151 finally: |
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152 close(cur) |
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153 |
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154 |
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155 def load_entries(self, project_id): |
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156 """ Loads all entries that belong to a specific project """ |
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157 logger.debug("load entries that belong to project %s" % project_id) |
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158 cur = None |
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159 try: |
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160 cur = self.con.cursor() |
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161 cur.execute(LOAD_PROJECT_ENTRIES % project_id) |
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162 |
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163 entries = [] |
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164 while True: |
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165 row = cur.fetchone() |
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166 |
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167 if not row: |
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168 break |
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169 entries.append(Entry(*row)) |
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170 |
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171 logger.debug("Found %i entries that belong to project '%i'" |
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172 % (len(entries), project_id)) |
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173 return entries |
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174 finally: |
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175 close(cur) |
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176 |
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177 |
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178 def insert_project_entry(self, project, stop_time, desc): |
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179 if project is None: |
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180 return |
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181 cur = None |
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182 try: |
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183 cur = self.con.cursor() |
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184 cur.execute(INSERT_PROJECT_ENTRY, ( |
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185 project.id, project.start, stop_time, desc)) |
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186 self.con.commit() |
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187 logger.debug("Added new entry '%s' of project '%s' into db" |
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188 % (desc, project.desc)) |
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189 |
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190 project.entries = self.load_entries(project.id) |
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191 finally: |
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192 close(cur) |
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193 |
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194 def insert_project(self, key, description): |
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195 if key is None or description is None: |
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196 return |
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197 cur = None |
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198 try: |
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199 cur = self.con.cursor() |
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200 cur.execute(INSERT_PROJECT, (key, description)) |
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201 self.con.commit() |
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202 logger.debug("Added a new project '%s' into db" % description) |
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203 finally: |
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204 close(cur) |
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205 |
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206 def delete_entries(self, entries): |
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207 if entries is None: |
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208 return |
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209 |
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210 cur = None |
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211 try: |
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212 cur = self.con.cursor() |
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213 for entry in entries: |
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214 cur.execute(DELETE_PROJECT_ENTRY % entry.id) |
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215 logger.debug("Deleted entry: %s (%d)" % (entry.desc, entry.id)) |
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216 self.con.commit() |
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217 finally: |
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218 close(cur) |
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219 |
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220 |
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221 def move_entries(self, entries, new_project_id): |
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222 if entries is None or new_project_id is None: |
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223 return |
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224 |
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225 cur = None |
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226 try: |
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227 cur = self.con.cursor() |
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228 for entry in entries: |
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229 cur.execute(MOVE_ENTRY, (new_project_id, entry.id)) |
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230 logger.debug("Moved entry '%s' (id=%d) to project with id %d." |
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231 % (entry.desc, entry.id, new_project_id)) |
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232 self.con.commit() |
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233 finally: |
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234 close(cur) |
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235 |
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236 def update_entry(self, entry): |
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237 if not entry: |
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238 return |
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239 |
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240 cur = None |
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241 try: |
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242 cur = self.con.cursor() |
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243 cur.execute(UPDATE_ENTRY, (entry.desc, entry.id)) |
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244 self.con.commit() |
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245 logger.debug("Updated entry: '%s' (%d)" % (entry.desc, entry.id)) |
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246 finally: |
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247 close(cur) |
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248 |
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249 def update_project(self, project): |
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250 if not project: |
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251 return |
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252 |
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253 cur = None |
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254 try: |
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255 cur = self.con.cursor() |
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256 cur.execute(UPDATE_PROJECT, (project.key, project.desc, project.id)) |
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257 self.con.commit() |
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258 logger.debug("Updated project: (%d) %s %s" % (project.id, |
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259 project.key, project.desc)) |
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260 finally: |
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261 close(cur) |
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262 |
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263 def close(cur): |
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264 """ This function closes a database cursor if it is existing """ |
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265 if cur: |
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266 try: |
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267 cur.close() |
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268 except: |
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269 logger.warn("could not close database cursor.") |
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270 |
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271 # vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |