From 36b8d3d0a8c97726d4413ae005b36e6288119ed4 Mon Sep 17 00:00:00 2001
From: Melody Horn <melody@boringcactus.com>
Date: Wed, 30 Jun 2021 19:55:47 -0600
Subject: use the table name matching what actually exists

---
 tosin-macros/src/lib.rs | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'tosin-macros/src')

diff --git a/tosin-macros/src/lib.rs b/tosin-macros/src/lib.rs
index f9d8fc0..9c1f650 100644
--- a/tosin-macros/src/lib.rs
+++ b/tosin-macros/src/lib.rs
@@ -148,6 +148,34 @@ fn impl_model(ast: &syn::DeriveInput) -> TokenStream {
     } else {
         panic!("not on a struct");
     };
+    let app_name = {
+        // ugly hack because span::module_path() doesn't exist
+        let call_site = proc_macro::Span::call_site();
+        let call_site_file = call_site.source_file();
+        let call_site_path = call_site_file.path();
+        if !call_site_file.is_real() {
+            panic!("call site does not have a real path");
+        }
+
+        let app_dir = if call_site_path.ends_with("models.rs") {
+            call_site_path.parent().unwrap()
+        } else {
+            todo!("not in models.rs what is this")
+        };
+
+        // oh this is so fucking disgusting
+        if app_dir.starts_with("examples") {
+            app_dir
+                .components()
+                .skip(1) // drop the "examples/", keep the example name
+                .map(|c| c.as_os_str().to_string_lossy())
+                .collect::<Vec<_>>()
+                .join("::")
+        } else {
+            todo!("what's a {}", call_site_path.display())
+        }
+    };
+    let real_table_name = format!("{}-{}", app_name, lowercase_name);
     let real_db_types: Vec<_> = ast_data
         .fields
         .iter()
@@ -277,6 +305,7 @@ fn impl_model(ast: &syn::DeriveInput) -> TokenStream {
 
         // this means users need #[macro_use] extern crate diesel; but fuck doing it ourselves
         table! {
+            #[sql_name = #real_table_name]
             #lowercase_name {
                 #(#diesel_columns,)*
             }
-- 
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