From cd630834a985be4b39a673d022e180de3ff20517 Mon Sep 17 00:00:00 2001
From: Michaël Ball <michael.ball@gmail.com>
Date: Sat, 13 Dec 2014 16:41:35 +0000
Subject: Initial commit

---
 common/__init__.py |  0
 common/utils.py    | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+)
 create mode 100644 common/__init__.py
 create mode 100644 common/utils.py

(limited to 'common')

diff --git a/common/__init__.py b/common/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/common/utils.py b/common/utils.py
new file mode 100644
index 0000000..484179a
--- /dev/null
+++ b/common/utils.py
@@ -0,0 +1,57 @@
+def make_where_clause(params):
+    """Create a where clause for each key-value pair in a dict, joined
+       by AND.
+
+    Parameters
+    ----------
+    params : dict
+        A dict of keys and values
+    """
+
+    where_items = []
+    where_clause = None
+
+    try:
+        for key in params.keys():
+            where_items.append("%s=:%s" % (key, key))
+
+        where_statement = None
+        if len(where_items) > 1:
+            where_statement = " AND ".join(where_items)
+        else:
+            where_statement = where_items[0]
+
+        where_clause = " ".join(("WHERE", where_statement))
+    except AttributeError:
+        pass
+
+    return where_clause
+
+
+def update_clause_from_dict(data):
+    """Create an update clause from a dictionary
+
+    Parameters
+    __________
+    data: dict
+        A dict of the new value and the column name as key
+    """
+
+    update_items = []
+    set_statement = None
+    update_clause = None
+
+    try:
+        for key in data.keys():
+            update_items.append("%s = :%s", (key, key))
+
+        if len(update_items) > 1:
+            update_clause = ", ".join(update_items)
+        else:
+            update_clause = update_items[0]
+
+        set_statement = " ".join(("SET", update_clause))
+    except AttributeError:
+        pass
+
+    return set_statement
-- 
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