Add more cases for tags in mongoQueryToFilter

lib/mongodb-functions.ts

@@ -458,6 +458,8 @@ export function mongoQueryToFilter(query): Expression {
 
           if (v.hasOwnProperty("$ne"))
             expressions.push(["IS NULL", ["PARAM", `Tags.${v["$ne"]}`]]);
+          else if (v.hasOwnProperty("$eq"))
+            expressions.push(["IS NOT NULL", ["PARAM", `Tags.${v["$eq"]}`]]);
           else throw new Error(`Invalid tag query`);
         } else {
           expressions.push(["IS NOT NULL", ["PARAM", `Tags.${v}`]]);
@@ -465,6 +467,7 @@ export function mongoQueryToFilter(query): Expression {
       } else if (k.startsWith("Tags.")) {
         let exists: boolean;
         if (typeof v === "boolean") exists = v;
+        else if (v.hasOwnProperty("$eq")) exists = !!v["$eq"];
         else if (v.hasOwnProperty("$ne")) exists = !v["$ne"];
         else if (v.hasOwnProperty("$exists")) exists = !!v["$exists"];
         else throw new Error(`Invalid tag query`);

test/mongodb-functions.ts

@@ -15,8 +15,11 @@ ava("mongoQueryToFilter", t => {
     [{ "Tags.test": { $exists: false } }, "Tags.test IS NULL"],
     [{ "Tags.test": { $ne: true } }, "Tags.test IS NULL"],
     [{ "Tags.test": { $ne: false } }, "Tags.test IS NOT NULL"],
+    [{ "Tags.test": { $eq: true } }, "Tags.test IS NOT NULL"],
+    [{ "Tags.test": { $eq: false } }, "Tags.test IS NULL"],
     [{ _tags: "test" }, "Tags.test IS NOT NULL"],
     [{ _tags: { $ne: "test" } }, "Tags.test IS NULL"],
+    [{ _tags: { $eq: "test" } }, "Tags.test IS NOT NULL"],
     [
       { $and: [{ test: "test" }, { test: { $ne: "test" } }] },
       'test = "test" AND test <> "test"'
@@ -35,9 +38,9 @@ ava("mongoQueryToFilter", t => {
   const shouldFailTests = [
     [{ test: { $gee: "test" } }, "Operator $gee not supported"],
     [{ test: [] }, "Invalid type"],
-    [{ "Tags.test": { $eq: true } }, "Invalid tag query"],
+    [{ "Tags.test": { $gt: true } }, "Invalid tag query"],
     [{ _tags: [] }, "Invalid type"],
-    [{ _tags: { $eq: "test" } }, "Invalid tag query"],
+    [{ _tags: { $gt: "test" } }, "Invalid tag query"],
     [{ $nor: [] }, "Operator $nor not supported"]
   ];