Create dgraph_schema_converter.sh

Script to convert Schema returned by schema{} query into text format used by alter endpoint.

Author: raphael-istari

dql-helper/dgraph_schema_converter.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+
+# Convert Dgraph JSON schema to text schema format
+# Usage: ./convert_schema.sh input.json > schema.dql
+
+# JSON format is returned by `schema{}` query.
+# curl -X POST -H "Content-Type: application/dql" \
+# localhost:8080/query -d $'schema {}'  > schema.json
+
+# Text format is used by the alter command to update the schema.
+
+
+if [ $# -eq 0 ]; then
+    echo "Usage: $0 <json_file>" >&2
+    exit 1
+fi
+
+json_file="$1"
+
+if [ ! -f "$json_file" ]; then
+    echo "Error: File '$json_file' not found" >&2
+    exit 1
+fi
+
+# Process predicates (schema)
+echo "# Predicates"
+jq -r '.data.schema[] | 
+    "<" + .predicate + ">: " + .type + " " +
+    (if .index then 
+        "@index(" + (.tokenizer | join(",")) + ")" 
+     else "" end) + " " +
+    (if .reverse then "@reverse" else "" end) + " " +
+    (if .upsert then "@upsert" else "" end) + " " +
+    (if .unique then "@unique" else "" end) + " " +
+    (if .list then "[" + .type + "]" else "" end) + " " +
+    " ." | 
+    gsub("  +"; " ") | 
+    gsub(" \\."; ".")' "$json_file"
+
+echo ""
+
+# Process types
+jq -r '.data.types[] | 
+    "type <" + .name + "> {\n" +
+    (.fields | map("\t" + .name) | join("\n")) +
+    "\n}"' "$json_file"