Force start and end date to be within comittee start and end date

website/activemembers/locale/nl/LC_MESSAGES/django.po

@@ -7,8 +7,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2017-07-05 19:09+0200\n"
-"PO-Revision-Date: 2017-08-17 11:41+0200\n"
+"POT-Creation-Date: 2017-09-13 19:42+0200\n"
+"PO-Revision-Date: 2017-09-13 19:50+0200\n"
 "Last-Translator: Sébastiaan Versteeg <se_bastiaan@outlook.com>\n"
 "Language-Team: \n"
 "Language: nl\n"
@@ -54,101 +54,109 @@ msgstr "contact mailinglijst"
 msgid "Wiki namespace"
 msgstr "Wiki namespace"
 
-#: models.py:121 models.py:124
+#: models.py:123 models.py:126
 msgid "Please use either the mailing list or email address option."
 msgstr "Selecteer een mailinglijst óf vul een e-mailadres in."
 
-#: models.py:135
+#: models.py:137
 msgid "committee"
 msgstr "commissie"
 
-#: models.py:136 templates/activemembers/committee_index.html:7
+#: models.py:138 templates/activemembers/committee_index.html:7
 msgid "committees"
 msgstr "commissies"
 
-#: models.py:157
+#: models.py:159
 msgid "Is this a board"
 msgstr "Is dit een bestuur"
 
-#: models.py:164
+#: models.py:166
 msgid "Access the board wiki"
 msgstr ""
 
-#: models.py:190 models.py:191
+#: models.py:192 models.py:193
 msgid "A board already exists for those years"
 msgstr "Er bestaat al een bestuur voor die jaren"
 
-#: models.py:209 models.py:342
+#: models.py:211 models.py:350
 msgid "Member"
 msgstr "Lid"
 
-#: models.py:215
+#: models.py:217
 msgid "Committee"
 msgstr "Commissie"
 
-#: models.py:219
+#: models.py:221
 msgid "Committee member since"
 msgstr "Commissielid sinds"
 
-#: models.py:220
+#: models.py:222
 msgid "The date this member joined the committee in this role"
 msgstr "De datum waarop deze persoon lid werd deze commissie in deze rol"
 
-#: models.py:225
+#: models.py:227
 msgid "Committee member until"
 msgstr "Commissielid tot"
 
-#: models.py:226
+#: models.py:228
 msgid "A member of this committee until this time (can't be in the future)."
 msgstr ""
 "De datum waarop deze persoon de commissie verliet (kan niet in de toekomst "
 "liggen)"
 
-#: models.py:233
+#: models.py:235
 msgid "Chair of the committee"
 msgstr "Voorzitter van de commissie"
 
-#: models.py:234
+#: models.py:236
 msgid "There can only be one chair at a time!"
 msgstr "Er kan maar één voorzitter tegelijkertijd zijn!"
 
-#: models.py:240
+#: models.py:242
 msgid "role"
 msgstr "rol"
 
-#: models.py:241
+#: models.py:243
 msgid "The role of this member"
 msgstr "De rol van dit lid binnen de commissie"
 
-#: models.py:267
+#: models.py:269
 msgid "End date can't be before start date"
 msgstr "De einddatum kan niet voor de startdatum liggen"
 
-#: models.py:270
+#: models.py:272
 msgid "End date can't be in the future"
 msgstr "De einddatum kan niet in de toekomst liggen"
 
-#: models.py:274
+#: models.py:276
+msgid "Start date can't be before committee start date"
+msgstr "De begindatum kan niet voor de begindatum van de commissie liggen"
+
+#: models.py:279
+msgid "Start date can't be after committee end date"
+msgstr "De begindatum kan niet na de einddatum van de commissie liggen"
+
+#: models.py:284
 msgid "End date cannot be set for boards"
 msgstr "Voor besturen kan geen einddatum worden opgegeven"
 
-#: models.py:298
+#: models.py:307
 msgid "There already is a chair for this time period"
 msgstr "Er is al een voorzitter voor deze periode"
 
-#: models.py:314
+#: models.py:324
 msgid "This member is already in the committee for this period"
 msgstr "Deze persoon is al lid van deze commissie in de aangegeven periode"
 
-#: models.py:334
+#: models.py:342
 msgid "committee membership"
 msgstr "commissielidmaatschap"
 
-#: models.py:335
+#: models.py:343
 msgid "committee memberships"
 msgstr "commissielidmaatschappen"
 
-#: models.py:347
+#: models.py:355
 #, python-brace-format
 msgid "{name} mentor in {year}"
 msgstr "{name} mentor in {year}"

website/activemembers/models.py

@@ -270,6 +270,17 @@ class CommitteeMembership(models.Model, metaclass=ModelTranslateMeta):
         if self.until and self.until > timezone.now().date():
             raise ValidationError(
                 {'until': _("End date can't be in the future")})
+
+        if (self.since and self.committee.since and
+                self.since < self.committee.since):
+            raise ValidationError(
+                {'since': _("Start date can't be before committee start date")}
+                )
+        if (self.since and self.committee.until and
+                self.since > self.committee.until):
+            raise ValidationError(
+                {'since': _("Start date can't be after committee end date")})
+
         try:
             if self.until and self.committee.board:
                 raise ValidationError(