Daco Harkes
81584f5d03
The sample wasn't working for the longest time. Fixes: - Null safety, and late fields. - `dart pub` instead of `pub`. - Use the new `NativeFinalizer` and `Finalizable` features. Change-Id: I0a397abae511ab3f6762d1b2c4047226d15e36d6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/143804 Commit-Queue: Daco Harkes <dacoharkes@google.com> Reviewed-by: Michael Thomsen <mit@google.com>
41 lines
1.4 KiB
Markdown
41 lines
1.4 KiB
Markdown
# Sample code dart:ffi
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This is an illustrative sample for how to use `dart:ffi`.
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## Prerequirement
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For Windows, Linux, and MacOS, you should make sure, sqlite dev lib installed on your system.
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Windows user can download dll from https://www.sqlite.org/download.html
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If you do not have any sqlite3.dll or so file, you may found error message:
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```
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Unhandled exception:
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Invalid argument(s): Failed to load dynamic library (126)
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#0 _open (dart:ffi-patch/ffi_dynamic_library_patch.dart:13:55)
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#1 new DynamicLibrary.open (dart:ffi-patch/ffi_dynamic_library_patch.dart:22:12)
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```
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## Building and Running this Sample
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Building and running this sample is done through pub.
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Running `dart run example/main` should produce the following output.
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```sh
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$ dart run example/main
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1 Chocolade chip cookie Chocolade cookie foo
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2 Ginger cookie null 42
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3 Cinnamon roll null null
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1 Chocolade chip cookie Chocolade cookie foo
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2 Ginger cookie null 42
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expected exception on accessing result data after close: The result has already been closed.
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expected this query to fail: no such column: non_existing_column (Code 1: SQL logic error)
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```
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## Tutorial
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A tutorial walking through the code is available in [docs/sqlite-tutorial.md](docs/sqlite-tutorial.md).
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For information on how to use this package within a Flutter app, see [docs/android.md](docs/android.md).
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(Note: iOS is not yet supported).
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