[image: Capture.PNG] In regards to your question..I want to remove the whole relationship for example.. the whole first row as shown in the picture:
On Friday, May 29, 2020 at 10:21:44 PM UTC+1, Mo Hus wrote: > > Hey Simon , permissions has only relationship with permission_contract and > contract only has relationship with permission_contract ...I want to be > able to delete the relationship from permission_contract ... > For example, in my permissions_contract, I may have permission_id = 1 > which is the id taken from permissions table and on the same row have > contract_id = 1 which is taken from contracts table, I want to be able to > query permissions_contract table and check if the contract id and > permission id passed to it is in the table and if so delete the > relationship... please advice and thanks in advance > > On Friday, May 29, 2020 at 7:33:22 PM UTC+1, Simon King wrote: >> >> It looks like you've got a many-to-many relationship between Contract and >> Permission, and you want to remove a Permission from a Contract (or vice >> versa). Is that right? >> >> If so, you can do something like this: >> >> contract = <some-contract> >> permission = <some-permission> >> >> contract.permissions.remove(permission) >> >> >> https://docs.sqlalchemy.org/en/13/orm/basic_relationships.html#deleting-rows-from-the-many-to-many-table >> >> (note that accessing "contract.permissions" will load all the permissions >> for that contract from the database, which might be inefficient depending >> on your application) >> >> Hope that helps, >> >> Simon >> >> On Fri, May 29, 2020 at 12:38 PM Mo Hus <teehus...@gmail.com> wrote: >> >>> Hey Jonathan, any luck? thanks >>> >>> On Thursday, May 28, 2020 at 4:15:38 PM UTC+1, Mo Hus wrote: >>>> >>>> [image: Capture.PNG] >>>> >>>> permission_id and contract_id have a relationship in the database >>>> >>>> How can i using remove a entry for example.. if permission_id = 2 and >>>> contract_id = 2 exists in the same entry as shown on line one in database, >>>> i want to be able to remove it from my database. (This entry is unique so >>>> can only appear once) >>>> >>>> I have tried PermissionEntity.query.get(contract_id) and >>>> PermissionEntity.query.get(permission_id) but doesnt seem to be >>>> working as Its not stored in a permission entity.. My relationship does >>>> not >>>> have an entity. the table i have provided a picture for has a relationship >>>> with permissions table and contracts table.. >>>> >>>> -- >>> SQLAlchemy - >>> The Python SQL Toolkit and Object Relational Mapper >>> >>> http://www.sqlalchemy.org/ >>> >>> To post example code, please provide an MCVE: Minimal, Complete, and >>> Verifiable Example. See http://stackoverflow.com/help/mcve for a full >>> description. >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "sqlalchemy" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to sqlal...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/sqlalchemy/aac681c3-1a8f-4f99-9d0c-31ab8350518e%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/sqlalchemy/aac681c3-1a8f-4f99-9d0c-31ab8350518e%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sqlalchemy/839cfc7d-e2b0-45d6-89c4-5bb6f4cc06b6%40googlegroups.com.
