diff --git a/network-poc/frontend/src/pages/index.astro b/network-poc/frontend/src/pages/index.astro
index 14f59cf..d38660c 100644
--- a/network-poc/frontend/src/pages/index.astro
+++ b/network-poc/frontend/src/pages/index.astro
@@ -193,6 +193,19 @@ import Settings from "../components/Settings.astro";
             if (fname === 'schemas.py') {
                 if (/:\s*date\b/.test(code) && !/from datetime import/.test(code))
                     issues.push('ISSUE: schemas.py: käyttää date-tyyppiä mutta "from datetime import date" puuttuu');
+                if (/:\s*datetime\b/.test(code) && !/from datetime import/.test(code))
+                    issues.push('ISSUE: schemas.py: käyttää datetime-tyyppiä mutta "from datetime import datetime" puuttuu');
+            }
+
+            // 4b. Python-syntaksi: JS-booleanit (false/true ilman isoa alkukirjainta)
+            for (let i = 0; i < lines.length; i++) {
+                const line = lines[i];
+                if (/^\s*#/.test(line) || /^\s*$/.test(line)) continue;
+                // Etsi false/true joita ei ole merkkijonon sisällä ja jotka eivät ole osa isompaa sanaa
+                if (/(?<!["\w])false(?![\w"])/.test(line))
+                    issues.push(`ISSUE: ${fname}:${i+1}: "false" ei ole Python — pitäisi olla "False"`);
+                if (/(?<!["\w])true(?![\w"])/.test(line))
+                    issues.push(`ISSUE: ${fname}:${i+1}: "true" ei ole Python — pitäisi olla "True"`);
             }
 
             // 5. test_main.py: ei saa uudelleenmääritellä appia tai modeleita
@@ -1121,6 +1134,29 @@ OUTPUT FORMAT:
 
     // === Template Pipeline — rakennuspalaset ===
 
+    // JS-arvo → Python-literaali: false→False, true→True, "teksti"→'"teksti"'
+    function pyLiteral(val) {
+        if (val === true) return 'True';
+        if (val === false) return 'False';
+        if (val === null || val === undefined) return 'None';
+        if (typeof val === 'string') return `"${val}"`;
+        return String(val);
+    }
+
+    // JSON-merkkijono jossa booleanit on Python-muodossa: {"a": True, "b": False}
+    function pyJsonLiteral(obj) {
+        const parts = Object.entries(obj).map(([k, v]) => {
+            let pyVal;
+            if (v === true) pyVal = 'True';
+            else if (v === false) pyVal = 'False';
+            else if (v === null) pyVal = 'None';
+            else if (typeof v === 'string') pyVal = `"${v}"`;
+            else pyVal = String(v);
+            return `"${k}":${pyVal}`;
+        });
+        return '{' + parts.join(',') + '}';
+    }
+
     const SPEC_SYSTEM = `You are a software architect who designs database schemas for Python web applications.
 
 THINK STEP BY STEP before outputting JSON:
@@ -1179,7 +1215,7 @@ Blog → Author: name,email,bio(Text|None) / Post: title, content(Text), author_
             for (const f of e.fields) {
                 let parts = [`Column(${f.sa_type}`];
                 if (!f.nullable) parts.push('nullable=False');
-                if (f.default !== null && f.default !== undefined) parts.push(typeof f.default === 'string' ? `default="${f.default}"` : `default=${f.default}`);
+                if (f.default !== null && f.default !== undefined) parts.push(`default=${pyLiteral(f.default)}`);
                 code += `    ${f.name} = ${parts.join(', ')})\n`;
             }
             code += '\n';
@@ -1189,13 +1225,27 @@ Blog → Author: name,email,bio(Text|None) / Post: title, content(Text), author_
     }
 
     function tmplSchemas(spec) {
+        // Tunnista tarvittavat datetime-importit kenttätyypeistä
+        const dtTypes = new Set();
+        for (const e of spec.entities) for (const f of e.fields) {
+            if (/\bdate\b/i.test(f.py_type) && !/datetime/.test(f.py_type)) dtTypes.add('date');
+            if (/\bdatetime\b/i.test(f.py_type)) dtTypes.add('datetime');
+        }
+
         let code = 'from pydantic import BaseModel\n';
-        for (const imp of (spec.extra_imports || [])) code += imp + '\n';
+        if (dtTypes.size > 0) code += `from datetime import ${[...dtTypes].sort().join(', ')}\n`;
+
+        // extra_imports: suodata pois pelkät nimet kuten "datetime" (jo käsitelty yllä)
+        for (const imp of (spec.extra_imports || [])) {
+            if (/^(date|datetime)$/.test(imp.trim())) continue; // käsitelty jo
+            if (/^from\s/.test(imp) || /^import\s/.test(imp)) code += imp + '\n';
+        }
         code += '\n';
+
         for (const e of spec.entities) {
             code += `class ${e.name}Create(BaseModel):\n`;
             for (const f of e.fields) {
-                if (f.default !== null && f.default !== undefined) code += `    ${f.name}: ${f.py_type} = ${typeof f.default === 'string' ? '"'+f.default+'"' : f.default}\n`;
+                if (f.default !== null && f.default !== undefined) code += `    ${f.name}: ${f.py_type} = ${pyLiteral(f.default)}\n`;
                 else if (f.nullable && f.py_type.includes('None')) code += `    ${f.name}: ${f.py_type} = None\n`;
                 else code += `    ${f.name}: ${f.py_type}\n`;
             }
@@ -1253,11 +1303,11 @@ Blog → Author: name,email,bio(Text|None) / Post: title, content(Text), author_
                 else if (f.py_type.includes('bool')) testData[f.name] = true;
                 else if (f.py_type.includes('date')) testData[f.name] = '2024-01-15';
             }
-            const td = JSON.stringify(testData);
+            const td = pyJsonLiteral(testData);
             const firstStr = e.fields.find(f => f.py_type.includes('str') && f.name !== 'status');
             const updateData = {...testData};
             if (firstStr) updateData[firstStr.name] = `Updated ${firstStr.name}`;
-            const ud = JSON.stringify(updateData);
+            const ud = pyJsonLiteral(updateData);
 
             code += `def test_create_${lo}():\n    response = client.post('/${tb}/', json=${td})\n    assert response.status_code == 201\n    assert 'id' in response.json()\n\n`;
             code += `def test_list_${lo}s():\n    client.post('/${tb}/', json=${td})\n    response = client.get('/${tb}/')\n    assert response.status_code == 200\n    assert len(response.json()) >= 1\n\n`;
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