issues: 860625833
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| id | node_id | number | title | user | state | locked | assignee | milestone | comments | created_at | updated_at | closed_at | author_association | pull_request | body | repo | type | active_lock_reason | performed_via_github_app | reactions | draft | state_reason |
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| 860625833 | MDU6SXNzdWU4NjA2MjU4MzM= | 1300 | Make row available to `render_cell` plugin hook | 3243482 | closed | 0 | 5 | 2021-04-18T10:14:37Z | 2022-07-07T16:34:05Z | 2022-07-07T16:31:22Z | CONTRIBUTOR | *Original title: **Generating URL for a row inside `render_cell` hook*** Hey, I am using Datasette to view a database that contains video metadata. It has BLOB columns that contain video thumbnails in JPG format (around 100-500KB per row). I've registered an output formatter that extends `datasette.blob_renderer.render_blob` function and serves the column with `image/jpeg` content type. ```python from datasette.blob_renderer import render_blob async def render_jpg(datasette, database, rows, columns, request, table, view_name): response = await render_blob(datasette, database, rows, columns, request, table, view_name) response.content_type = "image/jpeg" response.headers["Content-Disposition"] = f'inline; filename="image.jpg"' return response @hookimpl def register_output_renderer(): return { "extension": "jpg", "render": render_jpg, "can_render": lambda: True, } ``` This works well. I can visit `http://localhost:8001/mydb/videos/1.jpg?_blob_column=thumbnail` and view the image. I want to display the image directly with an `<img>` tag (lazy-loaded of course). So, I need a URL, because embedding base64 would increase the page size too much (each image > 100KB). Datasette generates a link with `.blob` extension for blob columns. It does this by calling `datasette.urls.row_blob` https://github.com/simonw/datasette/blob/7a2ed9f8a119e220b66d67c7b9e07cbab47b1196/datasette/views/table.py#L169-L179 But I have no way of getting the row inside the `render_cell` hook. ```python @hookimpl def render_cell(value, column, table, database, datasette): if isinstance(value, bytes) and imghdr.what(None, value): # generate url return '$renderedLink' ``` Any pointers? | 107914493 | issue | {"url": "https://api.github.com/repos/simonw/datasette/issues/1300/reactions", "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | completed |