Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

through_tables does not work on grandchildren #463

Open
jakent opened this issue Jul 10, 2023 · 3 comments · May be fixed by #468
Open

through_tables does not work on grandchildren #463

jakent opened this issue Jul 10, 2023 · 3 comments · May be fixed by #468

Comments

@jakent
Copy link

jakent commented Jul 10, 2023 •
edited
Loading

PGSync version: 2.5.0

Postgres version: 15.3

Elasticsearch version: 8.6.2

Redis version: 7.2

Python version: 3.8.9

Problem Description: though_tables does not work for grandchildren with a relationship field.

While it works as expected for direct child:

[
  {
    "database": "super_cool",
    "index": "users",
    "nodes": {
      "table": "users",
      "columns": [
        "id",
        "name"
      ],
      "children": [
        {
          "table": "group",
          "columns": [
            "id",
            "name"
          ],
          "relationship": {
            "variant": "object",
            "type": "one_to_many",
            "through_tables": [
              "users_groups"
            ]
          }
        }
      ]
    }
  }
]

It doesn’t work, when I do the same for a grandchild:

  {
    "database": "super_cool",
    "index": "job-managers",
    "nodes": {
      "table": "job",
      "children": [
        {
          "table": "users",
          "columns": [
            "id",
            "name"
          ],
          "relationship": { <---- I need this relationship because we also have created_by and last_modified_by which also join to this table
            "variant": "object",
            "type": "one_to_one",
            "foreign_key": {
              "child": ["id"],
              "parent": ["manager_id"]
            }
          },
          "children": [
            {
              "table": "group",
              "columns": [
                "id",
                "name"
              ],
              "relationship": {
                "variant": "object",
                "type": "one_to_many",
                "through_tables": [
                  "users_groups"
                ]
              }
            }
          ]
        }
      ]
    }
  }
]

Error Message (if any):

pgsync           | 2023-07-10 20:30:47.926:ERROR:pgsync.search_client: Exception 'super_cool.users_groups'
pgsync           | Traceback (most recent call last):
pgsync           |   File "/usr/local/lib/python3.8/site-packages/pgsync/search_client.py", line 133, in bulk
pgsync           |     self._bulk(
pgsync           |   File "/usr/local/lib/python3.8/site-packages/pgsync/search_client.py", line 188, in _bulk
pgsync           |     for _ in self.parallel_bulk(
pgsync           |   File "/usr/local/lib/python3.8/site-packages/elasticsearch/helpers/actions.py", line 472, in parallel_bulk
pgsync           |     for result in pool.imap(
pgsync           |   File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 868, in next
pgsync           |     raise value
pgsync           |   File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 125, in worker
pgsync           |     result = (True, func(*args, **kwds))
pgsync           |   File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 144, in _helper_reraises_exception
pgsync           |     raise ex
pgsync           |   File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 388, in _guarded_task_generation
pgsync           |     for i, x in enumerate(iterable):
pgsync           |   File "/usr/local/lib/python3.8/site-packages/elasticsearch/helpers/actions.py", line 155, in _chunk_actions
pgsync           |     for action, data in actions:
pgsync           |   File "/usr/local/lib/python3.8/site-packages/pgsync/sync.py", line 939, in sync
pgsync           |     self.query_builder.build_queries(
pgsync           |   File "/usr/local/lib/python3.8/site-packages/pgsync/querybuilder.py", line 879, in build_queries
pgsync           |     self._through(node)
pgsync           |   File "/usr/local/lib/python3.8/site-packages/pgsync/querybuilder.py", line 654, in _through
pgsync           |     for column in foreign_keys[through.name]:
pgsync           | KeyError: 'super_cool.users_groups'
pgsync           |  - super_cool.job
pgsync           |     - super_cool.users
pgsync           |        - super_cool.group
pgsync           |  0:01:20.856575 (80.86 sec)
@jakent jakent mentioned this issue Jul 11, 2023
Closed
@jakent
Copy link
Author

jakent commented Jul 13, 2023 •
edited
Loading

to give an example with the test data, the following schema will fail with the same error:

{
            "table": "user",
            "columns": ["id", "name"],
            "children": [
                {
                    "table": "book",
                    "columns": ["isbn", "title", "description"],
                    "relationship": {
                        "variant": "object",
                        "type": "one_to_many",
                        "foreign_key": {
                            "parent": ["id"],
                            "child": ["buyer_id"],
                        },
                    },
                    "children": [
                        {
                            "table": "author",
                            "columns": ["id", "name"],
                            "label": "authors",
                            "relationship": {
                                "type": "one_to_many",
                                "variant": "object",
                                "through_tables": ["book_author"],
                            },
                        }
                    ]
                }
            ]
        }

@jakent jakent linked a pull request Jul 14, 2023 that will close this issue
Open
@toluaina
Copy link
Owner

taking a look at this PR thanks

@NiciiA
Copy link

NiciiA commented Jan 22, 2024

This works for me in the newest version 3.1.0

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
None yet
Projects
None yet
Milestone
No milestone
3 participants
@jakent @toluaina @NiciiA