共享固定数值因子字段名

crates/fidc-core/src/data.rs

@@ -161,6 +161,8 @@ impl DailyMarketSnapshot {
     }
 }
 
+pub type NumericFactorMap = BTreeMap<Cow<'static, str>, f64>;
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct DailyFactorSnapshot {
     #[serde(with = "date_format")]
@@ -172,7 +174,7 @@ pub struct DailyFactorSnapshot {
     pub turnover_ratio: Option<f64>,
     pub effective_turnover_ratio: Option<f64>,
     #[serde(default)]
-    pub extra_factors: BTreeMap<String, f64>,
+    pub extra_factors: NumericFactorMap,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -3264,11 +3266,15 @@ fn normalize_factor_snapshots(factors: Vec<DailyFactorSnapshot>) -> Vec<DailyFac
                 .extra_factors
                 .into_iter()
                 .filter_map(|(field, value)| {
-                    let normalized = normalize_field(&field);
-                    if normalized.is_empty() || !value.is_finite() {
+                    let trimmed = field.as_ref().trim().trim_matches('"').trim_matches('\'');
+                    if trimmed.is_empty() || !value.is_finite() {
                         None
+                    } else if trimmed == field.as_ref()
+                        && trimmed.bytes().all(|byte| !byte.is_ascii_uppercase())
+                    {
+                        Some((field, value))
                     } else {
-                        Some((normalized, value))
+                        Some((Cow::Owned(trimmed.to_ascii_lowercase()), value))
                     }
                 })
                 .collect();
@@ -3962,10 +3968,9 @@ mod tests {
                 .map(|(index, date)| {
                     let mut extra_factors = BTreeMap::new();
                     if let Some(values) = availability {
-                        extra_factors
-                            .insert("source_daily_volume_available".to_string(), values[index]);
+                        extra_factors.insert("source_daily_volume_available".into(), values[index]);
                         if values[index] >= 0.5 {
-                            extra_factors.insert("daily_volume".to_string(), volumes[index] as f64);
+                            extra_factors.insert("daily_volume".into(), volumes[index] as f64);
                         }
                     }
                     DailyFactorSnapshot {
@@ -4140,10 +4145,7 @@ mod tests {
                     pe_ttm: 10.0,
                     turnover_ratio: None,
                     effective_turnover_ratio: None,
-                    extra_factors: BTreeMap::from([(
-                        "adjustment_factor_backward1".to_string(),
-                        factor,
-                    )]),
+                    extra_factors: BTreeMap::from([("adjustment_factor_backward1".into(), factor)]),
                 })
                 .collect(),
             Vec::new(),
@@ -4243,7 +4245,7 @@ mod tests {
                     extra_factors: if *date == dates[3] {
                         BTreeMap::new()
                     } else {
-                        BTreeMap::from([("adjustment_factor_backward1".to_string(), 1.0)])
+                        BTreeMap::from([("adjustment_factor_backward1".into(), 1.0)])
                     },
                 })
                 .collect(),