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Added relations between tables in erDiagram #4

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Merged
merged 1 commit into from
Apr 9, 2025
Merged

Added relations between tables in erDiagram #4

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12 changes: 9 additions & 3 deletions datacontract/model/data_contract_specification.py
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Original file line number Diff line number Diff line change
Expand Up @@ -341,19 +341,25 @@ def to_yaml(self):
def to_mermaid(self) -> str | None:
mmd_entity = "erDiagram\n\t"
mmd_references = []
mmd_relations = []
try:
for model_name, model in self.models.items():
entity_block=""
for field_name, field in model.fields.items():
entity_block += f"\t{ field_name.replace("#","Nb").replace(" ","_").replace("/","by")}{'🔑' if field.primaryKey or (field.unique and field.required) else ''}{'⌘' if field.references else''} {field.type}\n"
entity_block += f"\t{ field_name.replace('#','Nb').replace(' ','_').replace('/','by')}{'🔑' if field.primaryKey or (field.unique and field.required) else ''}{'⌘' if field.references else''} {field.type}\n"
if field.references:
mmd_references.append(f'"📑{field.references.split(".")[0] if "." in field.references else ""}"' + "}o--{ ||"+f'"📑{model_name}"')
mmd_references.append(f'"📑{field.references.split(".")[0] if "." in field.references else ""}"' + "||--o{" +f'"📑{model_name}"')
mmd_entity+= f'\t"📑{model_name}"'+'{\n' + entity_block + '}\n'

mmd_relations.append(model_name)
for i in range(len(mmd_relations)):
for j in range(i + 1, len(mmd_relations)):
mmd_entity+= f'\t"📑{mmd_relations[i]}"'+ " ||--o{ " + f'"📑{mmd_relations[j]}"' + ' : "applies to"' + '\n'
if mmd_entity == "":
return None
else:
return f"{mmd_entity}\n"

except Exception as e:
print(f"error : {e}, {self}")
return None