Improve error logging for field and index errors

Closes #113

lib/src/doc/field.rs

@@ -19,6 +19,8 @@ impl<'a> Document<'a> {
 		if !opt.fields {
 			return Ok(());
 		}
+		// Get the record id
+		let rid = self.id.as_ref().unwrap();
 		// Loop through all field statements
 		for fd in self.fd(opt, txn).await?.iter() {
 			// Loop over each field in document
@@ -53,6 +55,7 @@ impl<'a> Document<'a> {
 					// Process the ASSERT clause
 					if !expr.compute(&ctx, opt, txn, Some(&self.current)).await?.is_truthy() {
 						return Err(Error::FieldValue {
+							thing: rid.to_string(),
 							value: val.to_string(),
 							field: fd.name.clone(),
 							check: expr.to_string(),

lib/src/doc/index.rs

@@ -62,6 +62,7 @@ impl<'a> Document<'a> {
 							let key = crate::key::index::new(opt.ns(), opt.db(), &ix.what, &ix.name, &n, None);
 							if run.putc(key, rid, None).await.is_err() {
 								return Err(Error::IndexExists {
+									thing: rid.to_string(),
 									index: ix.name.to_string(),
 									value: match n.len() {
 										1 => n.first().unwrap().to_string(),
@@ -84,6 +85,7 @@ impl<'a> Document<'a> {
 							let key = crate::key::index::new(opt.ns(), opt.db(), &ix.what, &ix.name, &n, Some(&rid.id));
 							if run.putc(key, rid, None).await.is_err() {
 								return Err(Error::IndexExists {
+									thing: rid.to_string(),
 									index: ix.name.to_string(),
 									value: match n.len() {
 										1 => n.first().unwrap().to_string(),

lib/src/err/mod.rs

@@ -217,15 +217,17 @@ pub enum Error {
 	},
 
 	/// A database index entry for the specified record already exists
-	#[error("Database index `{index}` already contains {value}")]
+	#[error("Database index `{index}` already contains {value}, on record `{thing}`")]
 	IndexExists {
+		thing: String,
 		index: String,
 		value: String,
 	},
 
 	/// The specified field did not conform to the field ASSERT clause
-	#[error("Found {value} for field `{field}` but field must conform to: {check}")]
+	#[error("Found {value} for field `{field}`, on record `{thing}`, but field must conform to: {check}")]
 	FieldValue {
+		thing: String,
 		value: String,
 		field: Idiom,
 		check: String,