feat(repositories): add get_many_by_id method

lib/sqlxgentools_cli/src/gen_repositories.rs

@@ -44,6 +44,37 @@ fn gen_get_by_id_method(model: &Model) -> TokenStream {
     }
 }
 
+fn gen_get_many_by_id_method(model: &Model) -> TokenStream {
+    let resource_ident = format_ident!("{}", &model.name);
+    let primary_key = &model.fields.iter()
+        .find(|f| f.is_primary)
+        .expect("A model must have at least one primary key")
+        .name;
+    let select_query_tmpl = format!("SELECT * FROM {} WHERE {} IN ({{}})", model.table_name, primary_key);
+
+    let func_name_ident = format_ident!("get_many_by_{}", primary_key);
+
+    quote! {
+        pub async fn #func_name_ident(&self, items_ids: &[&str]) -> Result<Vec<#resource_ident>, sqlx::Error> {
+            if items_ids.is_empty() {
+                return Ok(vec![])
+            }
+            let placeholder_params: String = (1..=(items_ids.len()))
+                .map(|i| format!("${}", i))
+                .collect::<Vec<String>>()
+                .join(",");
+            let query_sql = format!(#select_query_tmpl, placeholder_params);
+            let mut query = sqlx::query_as::<_, #resource_ident>(&query_sql);
+            for id in items_ids {
+                query = query.bind(id)
+            }
+            query
+                .fetch_all(&self.db.0)
+                .await
+        }
+    }
+}
+
 fn gen_insert_method(model: &Model) -> TokenStream {
     let resource_ident = format_ident!("{}", &model.name);
     let error_msg = format!("Failed to insert resource {:?}", model.name.clone());
@@ -204,6 +235,7 @@ fn generate_repository_file(model: &Model) -> Result<SourceNodeContainer> {
 
     let get_all_method_code = gen_get_all_method(&model);
     let get_by_id_method_code = gen_get_by_id_method(&model);
+    let get_many_by_id_method_code = gen_get_many_by_id_method(&model);
     let insert_method_code = gen_insert_method(&model);
     let insert_many_method_code = gen_insert_many_method(&model);
     let update_by_id_method_code = gen_update_by_id_method(&model);
@@ -231,6 +263,8 @@ fn generate_repository_file(model: &Model) -> Result<SourceNodeContainer> {
 
             #get_by_id_method_code
 
+            #get_many_by_id_method_code
+
             #insert_method_code
 
             #insert_many_method_code