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DynamoDB improvements #221

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cab3ac1
feat: add docs
harry-anderson Nov 18, 2025
4077c80
feat: dynamodb_utils module and clean up tasks
harry-anderson Nov 18, 2025
5286c52
fix: docs
harry-anderson Nov 18, 2025
c7ef42a
fix: comments
harry-anderson Nov 23, 2025
4b70567
fix: types and comments
harry-anderson Nov 26, 2025
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88 changes: 83 additions & 5 deletions modules/tests/test_dynamodb/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -40,10 +40,13 @@ fn main(log: String, _: LogSource) -> Result<(), i32> {
],
"binary_field": { "_binary": BASE64_STANDARD.encode("binary_data") } // Binary
});
let item_hm = serde_json::from_value::<HashMap<String, serde_json::Value>>(item_json).unwrap();
let item_hm = serde_json::from_value(item_json).unwrap();
let input = PutItemInput {
table_name: table_name.clone(),
item: item_hm,
// NONE - If ReturnValues is not specified, or if its value is NONE, then nothing is returned. (This setting is the default for ReturnValues.)
// ALL_OLD - If PutItem overwrote an attribute name-value pair, then the content of the old item is returned.
// https://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_PutItem.html#DDB-PutItem-request-ReturnValues
return_values: Some(String::from("ALL_OLD")),
condition_expression: None,
expression_attribute_names: None,
Expand All @@ -56,8 +59,11 @@ fn main(log: String, _: LogSource) -> Result<(), i32> {
return Err(1);
}
Ok(output) => {
let output_json = to_value(&output).unwrap();
let expected = json!({"attributes":null});
let output_json =
to_value(&output).expect("failed deserializing PutItemOutput to value");
let expected = json!({
"attributes":null
});
plaid::print_debug_string(&format!("put_item output: {output_json}"));
if output_json != expected {
plaid::print_debug_string(&format!(
Expand All @@ -81,7 +87,44 @@ fn main(log: String, _: LogSource) -> Result<(), i32> {
};
let output = dynamodb::query(input).unwrap();
let output_json = to_value(&output).unwrap();
let expected = json!({"items":[{"age":33,"binaries":["ZGF0YTE=","ZGF0YTI="],"binary_field":{"_binary":"YmluYXJ5X2RhdGE="},"is_active":true,"metadata":{"city":"New York","country":"USA"},"name":"Jane Doe","null_field":null,"pk":"124","ratings":[3.8,4.5,5],"scores":[88,92,95],"tags":["aws","dev","rust"],"timestamp":"124"}]});
let expected = json!({
"items": [
{
"age": 33,
"binaries": [
"ZGF0YTE=",
"ZGF0YTI="
],
"binary_field": {
"_binary": "YmluYXJ5X2RhdGE="
},
"is_active": true,
"metadata": {
"city": "New York",
"country": "USA"
},
"name": "Jane Doe",
"null_field": null,
"pk": "124",
"ratings": [
3.8,
4.5,
5
],
"scores": [
88,
92,
95
],
"tags": [
"aws",
"dev",
"rust"
],
"timestamp": "124"
}
]
});
if output_json != expected {
plaid::print_debug_string(&format!(
"error: query output_json mismatch. expected {expected} got {output_json}"
Expand All @@ -107,7 +150,42 @@ fn main(log: String, _: LogSource) -> Result<(), i32> {

let output = dynamodb::delete_item(input).unwrap();
let output_json = to_value(&output).unwrap();
let expected = json!({"attributes":{"age":33,"binaries":["ZGF0YTE=","ZGF0YTI="],"binary_field":{"_binary":"YmluYXJ5X2RhdGE="},"is_active":true,"metadata":{"city":"New York","country":"USA"},"name":"Jane Doe","null_field":null,"pk":"124","ratings":[3.8,4.5,5],"scores":[88,92,95],"tags":["aws","dev","rust"],"timestamp":"124"}});
let expected = json!({
"attributes": {
"age": 33,
"binaries": [
"ZGF0YTE=",
"ZGF0YTI="
],
"binary_field": {
"_binary": "YmluYXJ5X2RhdGE="
},
"is_active": true,
"metadata": {
"city": "New York",
"country": "USA"
},
"name": "Jane Doe",
"null_field": null,
"pk": "124",
"ratings": [
3.8,
4.5,
5
],
"scores": [
88,
92,
95
],
"tags": [
"aws",
"dev",
"rust"
],
"timestamp": "124"
}
});
if output_json != expected {
plaid::print_debug_string(&format!(
"error: delete_item output_json mismatch. expected {expected} got {output_json}"
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