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Casting columns as a different data type on select, insert and update #1304

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merged 10 commits into from
Jan 12, 2023
Merged

Casting columns as a different data type on select, insert and update #1304

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524f856
Cast select and value
billy1624 Dec 14, 2022
f79a4f9
Refactoring
billy1624 Dec 14, 2022
fb1f42e
Test casting Postgres citext
billy1624 Dec 14, 2022
2b943c2
Fixup
billy1624 Dec 14, 2022
673e541
Revert
billy1624 Dec 14, 2022
6295fcf
Add test cases
billy1624 Jan 5, 2023
6e101d5
Merge branch 'master' into cast-cols
billy1624 Jan 5, 2023
702c11b
Fixup
billy1624 Jan 5, 2023
faf1969
Rename methods
billy1624 Jan 11, 2023
0b7c12e
Merge branch 'master' into cast-cols
billy1624 Jan 11, 2023
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53 changes: 53 additions & 0 deletions sea-orm-macros/src/derives/entity_model.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,8 @@ pub fn expand_derive_entity_model(data: Data, attrs: Vec<Attribute>) -> syn::Res
// generate Column enum and it's ColumnTrait impl
let mut columns_enum: Punctuated<_, Comma> = Punctuated::new();
let mut columns_trait: Punctuated<_, Comma> = Punctuated::new();
let mut cast_selects: Punctuated<_, Comma> = Punctuated::new();
let mut cast_values: Punctuated<_, Comma> = Punctuated::new();
let mut primary_keys: Punctuated<_, Comma> = Punctuated::new();
let mut primary_key_types: Punctuated<_, Comma> = Punctuated::new();
let mut auto_increment = true;
Expand Down Expand Up @@ -90,6 +92,8 @@ pub fn expand_derive_entity_model(data: Data, attrs: Vec<Attribute>) -> syn::Res
let mut nullable = false;
let mut default_value = None;
let mut default_expr = None;
let mut cast_select = None;
let mut cast_value = None;
let mut indexed = false;
let mut ignore = false;
let mut unique = false;
Expand Down Expand Up @@ -169,6 +173,24 @@ pub fn expand_derive_entity_model(data: Data, attrs: Vec<Attribute>) -> syn::Res
format!("Invalid enum_name {:?}", nv.lit),
));
}
} else if name == "cast_select" {
if let Lit::Str(litstr) = &nv.lit {
cast_select = Some(litstr.value());
} else {
return Err(Error::new(
field.span(),
format!("Invalid cast_select {:?}", nv.lit),
));
}
} else if name == "cast_value" {
if let Lit::Str(litstr) = &nv.lit {
cast_value = Some(litstr.value());
} else {
return Err(Error::new(
field.span(),
format!("Invalid cast_value {:?}", nv.lit),
));
}
}
}
}
Expand Down Expand Up @@ -224,6 +246,23 @@ pub fn expand_derive_entity_model(data: Data, attrs: Vec<Attribute>) -> syn::Res
});
}

if let Some(cast_select) = cast_select {
cast_selects.push(quote! {
Self::#field_name => sea_orm::sea_query::SimpleExpr::cast_as(
Into::<sea_orm::sea_query::SimpleExpr>::into(expr),
sea_orm::sea_query::Alias::new(&#cast_select),
),
});
}
if let Some(cast_value) = cast_value {
cast_values.push(quote! {
Self::#field_name => sea_orm::sea_query::SimpleExpr::cast_as(
Into::<sea_orm::sea_query::SimpleExpr>::into(val),
sea_orm::sea_query::Alias::new(&#cast_value),
),
});
}

let field_type = &field.ty;
let field_type = quote! { #field_type }
.to_string() //E.g.: "Option < String >"
Expand Down Expand Up @@ -347,6 +386,20 @@ pub fn expand_derive_entity_model(data: Data, attrs: Vec<Attribute>) -> syn::Res
#columns_trait
}
}

fn cast_select(&self, expr: sea_orm::sea_query::Expr) -> sea_orm::sea_query::SimpleExpr {
match self {
#cast_selects
_ => sea_orm::prelude::ColumnTrait::cast_select_enum(self, expr),
}
}

fn cast_value(&self, val: sea_orm::sea_query::Expr) -> sea_orm::sea_query::SimpleExpr {
match self {
#cast_values
_ => sea_orm::prelude::ColumnTrait::cast_value_enum(self, val),
}
}
}

#entity_def
Expand Down
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