Show source when trying to materialize a lazy data frame

[krlmlr]

The error should contain the source of the call. How to achieve?

library(tidyverse)
library(duckplyr)


dd <- tibble(x = 1:100, y = rep(LETTERS[1:20], 5))


write_csv(dd, "test.csv")


## open file without reading it into memory and perform aggregations

df <- duck_file("test.csv", "read_csv")

df_stat <- df |>
  group_by(y) |>
  summarise(total = sum(x)) |>
  ungroup()
#> Error: Materialization is disabled, use collect() or as_tibble() to materialize

^{Created on 2024-12-31 with reprex v2.1.1}

[krlmlr]

Now, PR incoming:

library(tidyverse)

dd <- tibble(x = 1:100, y = rep(LETTERS[1:20], 5))


readr::write_csv(dd, "test.csv")


## open file without reading it into memory and perform aggregations

df <- duckplyr::duck_file("test.csv", "read_csv")

df_stat <- df |>
  group_by(y) |>
  summarise(total = sum(x)) |>
  ungroup()
#> Error in `group_by()`:
#> ! This operation cannot be carried out by DuckDB, and the input is a
#>   lazy duckplyr frame.
#> • Try `summarise(.by = ...)` or `mutate(.by = ...)` instead of `group_by()` and
#>   `ungroup()`.
#> • Use `compute(lazy = FALSE)` to materialize to temporary storage and continue
#>   with duckplyr.
#> • See the "Eager and lazy" section in `?duck_tbl()` for other options.

^{Created on 2025-01-11 with reprex v2.1.1}